Page Information
Current Status
High Level
Proper Name
Jerome Martin Koosman
Stat Years
1965-1985  [mlb] 1967-1985
Height/Weight
6-2 / 208
Bats/Throws
Right / Left
Positions
P (612)
Draft Position
P
Born Date/Place
High School
Colleges
University of Minnesota-Morris (Morris, Minnesota)
Draft
Signed as undrafted free agent by the New York Mets in 1964
Bonus
Signing Scouts
Red Murff
MLB Debut
1967-04-14 - Boxscore  (Age: 23.113)
Service Time
Organizations
NYN [12] MIN [3] CHA [3] PHI [2]
ID Numbers
tbc id: 13896 ... retro id: koosj001 ... mlbam id: 117255
Relations
Pitch Repertoire
TBC Apps
Career Talent RatingsPitchingStrikeouts66Walks67Hittable53SO/BB75vsPower53Hitting23Durability78Team.484Ratings Explained
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Career Pitching Statistics

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  • YearTeam NameLgLvlOrgUnifAgeExpDetailWLERAGGSCGSHOGFGRSVIPHRERHRBBSOWPBKHBWHIPH9HR9BB9SO9RA9SO BBWPCT
    1965GreenvilleWcarA----211---5114.7127000000107.010170560561280001.478.500.004.7110.775.892.29.313
    1965WilliamsportEastAA----211---023.75200000012.01175011110001.838.250.008.258.255.251.00.000
    1965Minor Totals: byYearAA/A----212---5134.61290000290119.011277610671390001.508.470.005.0710.515.822.07.278
    1966AuburnNYPLA-----222---1271.3824000000170.010943260431740000.895.770.002.289.212.284.05.632
    1966Minor Totals: byYearA-----221---1271.38240000240170.010943260431740000.895.770.002.289.212.284.05.632
    1967JacksonvilleILAAA----233---11102.4325000000178.013760480461830001.036.930.002.339.253.033.98.524
    1967New York MetsNLMLBnyn36233Log - Sp - Ext - Perf026.04930016022.1221715319110101.848.871.217.664.436.850.58.000
    1967Minor Totals: byYearAAA----231---11102.43250000250178.013760480461830001.036.930.002.339.253.033.98.524
    1967MLB Totals: NYNbyYearMLB----231Log - Sp - Ext - Perf026.11930016022.3221715319110101.868.961.227.744.486.920.58.000
    1968New York MetsNLMLBnyn36244Log - Sp - Ext - Perf19122.083534177010263.2221726116691788081.107.540.552.366.082.462.58.613
    1968MLB Totals: NYNbyYearMLB----241Log - Sp - Ext - Perf19122.093534177010263.7221726116691788081.107.560.552.366.092.462.58.613
    1969New York MetsNLMLBnyn36255Log - Sp - Ext - Perf1792.283232166000241.0187666114681807241.066.980.522.546.722.462.65.654
    1969MLB Totals: NYNbyYearMLB----251Log - Sp - Ext - Perf1792.283232166000241.0187666114681807241.066.980.522.546.722.462.65.654
    1970New York MetsNLMLBnyn36266Log - Sp - Ext - Perf1273.14302951010212.0189877422711187321.238.020.933.015.013.691.66.632
    1970MLB Totals: NYNbyYearMLB----261Log - Sp - Ext - Perf1273.14302951010212.0189877422711187321.238.020.933.015.013.691.66.632
    1971New York MetsNLMLBnyn36277Log - Sp - Ext - Perf6113.04262440020165.216066561251967011.278.690.652.775.223.591.88.353
    1971MLB Totals: NYNbyYearMLB----271Log - Sp - Ext - Perf6113.05262440020165.716066561251967011.288.720.652.785.233.601.88.353
    1972New York MetsNLMLBnyn36288Log - Sp - Ext - Perf11124.143424415101163.0155817514521479061.278.560.772.878.124.472.83.478
    1972MLB Totals: NYNbyYearMLB----281Log - Sp - Ext - Perf11124.143424415101163.0155817514521479061.278.560.772.878.124.472.83.478
    1973New York MetsNLMLBnyn36299Log - Sp - Ext - Perf14152.843535123000263.0234938318761563041.188.010.622.605.343.182.05.483
    1973MLB Totals: NYNbyYearMLB----291Log - Sp - Ext - Perf14152.843535123000263.0234938318761563041.188.010.622.605.343.182.05.483
    1974New York MetsNLMLBnyn363010Log - Sp - Ext - Perf15113.363535130000265.02581139916851888171.298.760.542.896.383.842.21.577
    1974MLB Totals: NYNbyYearMLB----301Log - Sp - Ext - Perf15113.363535130000265.02581139916851888171.298.760.542.896.383.842.21.577
    1975New York MetsNLMLBnyn363111Log - Sp - Ext - Perf14133.423634114222239.22341069119981737741.398.790.713.686.503.981.77.519
    1975MLB Totals: NYNbyYearMLB----311Log - Sp - Ext - Perf14133.423634114222239.72341069119981737741.398.800.713.696.513.991.77.519
    1976New York MetsNLMLBnyn363212Log - Sp - Ext - Perf21102.693432173020247.1205817419662003111.107.460.692.407.282.953.03.677
    1976MLB Totals: NYNbyYearMLB----321Log - Sp - Ext - Perf21102.703432173020247.3205817419662003111.107.470.692.407.282.953.03.677
    1977New York MetsNLMLBnyn363313Log - Sp - Ext - Perf8203.49323261000226.21951028817811922441.227.740.673.227.624.052.37.286
    1977MLB Totals: NYNbyYearMLB----331Log - Sp - Ext - Perf8203.50323261000226.71951028817811922441.227.760.683.227.644.062.37.286
    1978New York MetsNLMLBnyn363414Log - Sp - Ext - Perf3153.75383230662235.12211109817841605181.308.450.653.216.124.211.90.167
    1978MLB Totals: NYNbyYearMLB----341Log - Sp - Ext - Perf3153.75383230662235.32211109817841605181.308.460.653.226.134.211.90.167
    1979Minnesota TwinsALMLBmin363515Log - Sp - Ext - Perf20133.383736102010263.22681089919831572131.339.150.652.835.363.691.89.606
    1979MLB Totals: MINbyYearMLB----351Log - Sp - Ext - Perf20133.393736102010263.72681089919831572131.339.160.652.845.373.691.89.606
    1980Minnesota TwinsALMLBmin363616Log - Sp - Ext - Perf16134.03383480242243.125211910924691492151.329.320.892.555.514.402.16.552
    1980MLB Totals: MINbyYearMLB----361Log - Sp - Ext - Perf16134.04383480242243.325211910924691492151.329.330.892.555.524.412.16.552
    1981Minnesota TwinsALMLBmin363717Log - Sp - Ext - Perf394.2019132156594.1984944834551101.409.350.763.245.254.671.62.250
    1981Chicago White SoxALMLBcha363717Log - Sp - Ext - Perf143.33831045027.027101027211001.269.000.672.337.003.333.00.200
    1981MLB Totals: MIN-CHAbyYearMLB----372Log - Sp - Ext - Perf4134.012716319115121.312559541041762101.379.290.743.055.654.381.85.235
    1982Chicago White SoxALMLBcha363818Log - Sp - Ext - Perf1173.8442193112233173.11948174938884221.3410.070.471.974.574.212.32.611
    1982MLB Totals: CHAbyYearMLB----381Log - Sp - Ext - Perf1173.8542193112233173.31948174938884221.3410.090.471.984.584.212.32.611
    1983Chicago White SoxALMLBcha363919Log - Sp - Ext - Perf1174.773724216132169.217696901953905061.359.341.012.814.775.091.70.611
    1983MLB Totals: CHAbyYearMLB----391Log - Sp - Ext - Perf1174.793724216132169.717696901953905061.359.361.012.824.795.111.70.611
    1984Philadelphia PhilliesNLMLBphi24,374020Log - Sp - Ext - Perf14153.25363431020224.023295818601376231.309.320.322.415.503.822.28.483
    1984MLB Totals: PHIbyYearMLB----401Log - Sp - Ext - Perf14153.25363431020224.023295818601376231.309.320.322.415.503.822.28.483
    1985Philadelphia PhilliesNLMLBphi244121Log - Sp - Ext - Perf644.6219183101099.110756511434602231.429.691.273.085.445.071.76.600
    1985MLB Totals: PHIbyYearMLB----411Log - Sp - Ext - Perf644.6319183101099.310756511434602231.429.721.273.095.455.091.76.600
    MLB Totals (20 yrs)2222093.36612527140334385173,839.3363516081433290119825568929711.268.520.682.815.993.772.13.515
    National League Totals (14 yrs)1601563.1643139811428143352,868.026201145100720991419967424551.238.220.662.876.263.592.18.506
    American League Totals (6 yrs)62533.95181129265295212971.3101546342681284560155161.349.410.752.635.194.291.97.539
    Minor League Totals28302.60780000780467.035818013501564960001.106.900.003.019.563.473.18.483
    Minor: A- Totals1271.38240000240170.010943260431740000.895.770.002.289.212.284.05.632
    Minor: A Totals5114.71270000270107.010170560561280001.478.500.004.7110.775.892.29.313
    Minor: AA Totals023.75200002012.01175011110001.838.250.008.258.255.251.00.000
    Minor: AAA Totals11102.43250000250178.013760480461830001.036.930.002.339.253.033.98.524
    New York Mets Totals (12 yrs)1401373.1037634610826143052,544.7228199487518782017996620491.228.070.662.906.363.522.19.505
    Minnesota Twins Totals (3 yrs)39353.7794832037117601.3618276252511863615381.349.250.762.785.414.131.94.527
    Chicago White Sox Totals (3 yrs)23184.2387466222415370.0397187174309819910281.349.660.732.384.844.552.03.561
    Philadelphia Phillies Totals (2 yrs)20193.68555262030323.333915113222941978461.349.440.612.625.494.212.10.513
    Glossary:
    Year Context-dependent but usually self-evident. (Season, Draft Year etc) Team Name Contextual to the grid but usually self-evident. Draft = Drafted team. Lg League Org Major League Parent Organization. For college teams, might include RPI (Ratings Percentage Index) Unif Uniform Number, if available Age Player's age for the selected season or as of a current date if in YY.DDD format. Exp Experience in # of years. For Player stats, refers to nth PRO season. Count is ontextual to the purpose of the grid Detail Includes links to additional MLB stat detail including Game Logs, Splits and Extended Statistics W Wins (Pitcher or Team) L Losses (Pitcher or Team) ERA Earned Run Average ( (9/IP)*ER ) G Games Played (or Pitched) GS Games Started CG Complete Games SHO Shutouts GF Games Finished GR Games Relieved SV Saves IP Innings Pitched H Hits R Runs ER Earned Runs HR Home Runs BB Walks SO Strikeouts WP Wild Pitches BK Balks HB Hit Batsmen from pitcher perspective WHIP Walks and Hits per Inning Pitched ( (H+BB) / IP ) H9 Hits allowed per 9 innings ( (9/IP) * H ) HR9 Home Runs allowed per 9 innings ( (9/IP) * HR ) BB9 Walks per 9 innings ( (9/IP) * BB ) SO9 Strikeouts per 9 innings ( (9/IP) * SO ) RA9 Runs Against per 9 innings ( (9/IP) * R ) SO BB Strikeouts to Walk ratio ( SO/BB ) WPct Winning Percentage (W/(W+L))

    Career Batting Statistics

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  • YearTeam NameLgLvlOrgUnifAgePosDetailExpGABRH2B3BHRRBISBCSBBSOHPSHSFIWDPAVGOBPSLGOPSPATBXBHsecAISObabipBB%SO%SOBBABHRHR%XBH%
    1967New York MetsNLMLBnyn3623pL-S-E-P192000000001100000.000.333.000.333300.500.000.00033.3333.331.000.00.000.0
    1968New York MetsNLMLBnyn3624pL-S-E-P235913710140036203001.077.106.121.22797112.077.044.2143.0963.9220.6791.01.0328.6
    1969New York MetsNLMLBnyn3625pL-S-E-P332841400010014604002.048.059.048.1078940.012.000.1051.1251.6946.000.00.000.0
    1970New York MetsNLMLBnyn3626pL-S-E-P430705610040084608002.086.179.100.2798671.129.014.2509.3053.495.750.00.0016.7
    1971New York MetsNLMLBnyn3627pL-S-E-P526503800000032516001.160.222.160.3826080.060.000.3205.0041.678.330.00.000.0
    1972New York MetsNLMLBnyn3628pL-S-E-P634471400010001809001.085.085.085.1705640.000.000.1380.0032.140.000.00.000.0
    1973New York MetsNLMLBnyn3629pL-S-E-P7357838100300237015002.103.125.115.2409591.038.012.1952.1138.9518.500.00.0012.5
    1974New York MetsNLMLBnyn3630pL-S-E-P83586516210500729010002.186.247.233.480103203.128.047.2816.8028.164.140.00.0018.8
    1975New York MetsNLMLBnyn3631pL-S-E-P9367841420061043107000.179.220.205.42589162.090.026.2984.4934.837.750.00.0014.3
    1976New York MetsNLMLBnyn3632pL-S-E-P103479517200600234013001.215.235.241.47694192.051.026.3782.1336.1717.000.00.0011.8
    1977New York MetsNLMLBnyn3633pL-S-E-P1132722800170003015102.111.122.153.27579111.042.042.1670.0037.970.0072.01.2712.5
    1978New York MetsNLMLBnyn3634pL-S-E-P1238701630020002705000.086.086.129.2157593.043.043.1400.0036.000.000.00.0050.0
    1984Philadelphia PhilliesNLMLBphi24,3740pL-S-E-P13367428000300123014003.108.120.108.2288980.014.000.1571.1225.8423.000.00.000.0
    1985Philadelphia PhilliesNLMLBphi2441pL-S-E-P141934130004001901102.088.111.088.1993730.029.000.1152.7024.329.000.00.000.0
    MLB Totals (14 yrs)43191536109121246103341821002019.119.151.141.292105212915.059.022.2153.1439.7312.67457.50.1913.8
    National League Totals (14 yrs)43191536109121246103341821002019.119.151.141.292105212915.059.022.2153.1439.7312.67457.50.1913.8
    New York Mets Totals (12 yrs)376807339812123910313862851014.121.156.146.30292611815.064.025.2293.3541.6812.45403.50.2215.3
    Philadelphia Phillies Totals (2 yrs)55108311000700232015105.102.117.102.219126110.019.000.1431.5925.4016.000.00.000.0
    Glossary:
    Year Context-dependent but usually self-evident. (Season, Draft Year etc) Team Name Contextual to the grid but usually self-evident. Draft = Drafted team. Lg League Org Major League Parent Organization. For college teams, might include RPI (Ratings Percentage Index) Unif Uniform Number, if available Age Player's age for the selected season or as of a current date if in YY.DDD format. Pos Defensive Position Detail Includes links to additional MLB stat detail including Game Logs, Splits and Extended Statistics Exp Experience in # of years. For Player stats, refers to nth PRO season. Count is ontextual to the purpose of the grid G Games Played (or Pitched) AB At Bats R Runs H Hits 2B Doubles 3B Triples HR Home Runs RBI Runs Batted In SB Stolen Bases (Total) CS Caught Stealings BB Walks SO Strikeouts HP Hit by Pitch SH Sacrifice Hits SF Sacrifice Flies IW Intentional Walks DP Grounded into Double Play (Offense) Double Plays Participation (Defense) AVG Batting Average ( H/AB ) OBP On Base Percentage ( H+BB+HBP / (AB+BB+HBP+SF) SLG Slugging Percentage ( TB / AB ) OPS On Base Plus Slugging (OBP + SLG) PA Plate Appearances TB Total Bases (Singles + (2*Doubles) + (3*Triples) + (4*Home Runs)) XBH Extra Base Hits (Doubles+Triples+Home Runs) secA Seconday Average. Measures extra bases earned by player (BB+(TB-H)+(SB-CS) / AB ISO Isolated Power. Measures the portion of a slugging percentage that is for extra base hits. (SLG-BAVG). babip Batting Average on Balls Put in Play. (H/(AB-SO)) XBH% Extra Base Hit Percentage (XBH/H)

    Career Fielding Statistics

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  • YearTeam NameLgLvlAgepositGGSINNPOAEDPTCTSCFPCTRFGRFITeam SharePlayer ShareTeam Rank
    1967New York MetsNLMLB23P9022.10501551.0000.600.235.6100.016
    1968New York MetsNLMLB24P350263.25420247471.0001.300.1821.6100.04
    1969New York MetsNLMLB25P320241.0437134241.9761.300.1719.8100.06
    1970New York MetsNLMLB26P300212.07200127271.0000.900.1318.5100.06
    1971New York MetsNLMLB27P260166.0623123029.9671.100.1716.0100.09
    1972New York MetsNLMLB28P340163.0423112827.9640.800.1721.8100.04
    1973New York MetsNLMLB29P350263.0541214846.9581.300.1721.7100.04
    1974New York MetsNLMLB30P350265.0841425349.9251.400.1821.6100.04
    1975New York MetsNLMLB31P360239.21032334542.9331.200.1822.2100.03
    1976New York MetsNLMLB32P340247.1539314744.9361.300.1821.0100.05
    1977New York MetsNLMLB33P320226.2425403329.8790.900.1319.8100.05
    1978New York MetsNLMLB34P380235.1448645852.8971.400.2223.5100.03
    1979Minnesota TwinsALMLB35P370263.21050566560.9231.600.2322.8100.03
    1980Minnesota TwinsALMLB36P380243.1741325148.9411.300.2023.6100.03
    1981Minnesota TwinsALMLB37P19094.1515102120.9521.100.2117.4100.08
    1981Chicago White SoxALMLB37P8027.02200441.0000.500.157.5100.010
    1982Chicago White SoxALMLB38P420173.11224133736.9730.900.2125.9100.04
    1983Chicago White SoxALMLB39P370169.2526223331.9390.800.1822.8100.05
    1984Philadelphia PhilliesNLMLB40P360224.0934414743.9151.200.1922.2100.05
    1985Philadelphia PhilliesNLMLB41P19099.1414111918.9470.900.1811.7100.010
    MLB Totals - (P)61203,836116582423611.0000.000.00---------
    Glossary:
    Year Context-dependent but usually self-evident. (Season, Draft Year etc) Team Name Contextual to the grid but usually self-evident. Draft = Drafted team. Lg League Age Player's age for the selected season or as of a current date if in YY.DDD format. G Games Played (or Pitched) GS Games Started Inn Innings in a game or Innings played at position PO Putouts A Fielding assists E Errors DP Grounded into Double Play (Offense) Double Plays Participation (Defense) TC Total Chances (PO+A+E) TSC Total Successful Chances (PO+A) FPCT Fielding Percentage (TSC/TC) RFg Range Factor by Game (Total Successful Chances/Games) Rfi Range Factor by Inning (Total Successful Chances/Innings) Team Share Share of team's games played at that position. Will add up to more than 100% since the formula is player games at position / team games. Player Share Share of player's games played at that position Team Rank Rank of games for team at that position.

    Fielding Positional Grid by Year

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    YearCategoryPC1B2B3BSSLFCFRFOFDH
    1967MLB9----------
    1968MLB35----------
    1969MLB32----------
    1970MLB30----------
    1971MLB26----------
    1972MLB34----------
    1973MLB35----------
    1974MLB35----------
    1975MLB36----------
    1976MLB34----------
    1977MLB32----------
    1978MLB38----------
    1979MLB37----------
    1980MLB38----------
    1981MLB27----------
    1982MLB42----------
    1983MLB37----------
    1984MLB36----------
    1985MLB19----------
    Totals612----------