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'KO' Major LeaguersBaseball Players
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Jim Konstanty played in the Major Leagues between 1944-1956
All historical Major Leaguers since 1871 are included on the site. Each player has their own page with bio, statistics, transactions, awards and quite a bit more. The players are organized below by last name but it is much quicker to get to the players by using the search box at the top of the page.

Some Random Major Leaguers: Joe Blanton (2004-2017), Hank Allen (1966-1973), Carl East (1915-1924), Lew Richie (1906-1913), Alex Johnson (1964-1976), Don Hood (1973-1983), Prince Fielder (2005-2016)


Total Major Leaguers19,209
'KO' Major Leaguers Listed Below88

Major Leaguers -- Minor Leaguers -- College Players -- Players Main -- Random Major Leaguer -- Random Active MLB -- Player Inclusion Rules

Major Leaguers starting with 'KO'

Top Active Players Recently Active Drafted Players 1st Round Draft Picks 7+ year Major Leaguer
Player NamePosProper NameHt Wt B-T BornDate Place HiLvlStat YearsMLB YearsDraft InformationStatusCurrent Org (Level)
Nick KobackCNicholas Nicholie Koback6-0 187 R-R 1935-07-19 Hartford,Connecticut MLB1953-19551953-1955    
Masahide KobayashiPMasahide Kobayashi6-1 172 R-R 1974-05-24 Yamanashi,Japan MLB1999-20112008-2009
2007-   UDFA-CLE
 
Kevin KobelPKevin Richard Kobel6-1 195 R-L 1953-10-02 Buffalo,New York MLB1971-19821973-1980
1971-11- 250-MIL
 
Jeff KobernusOFJeffrey Gilbert Kobernus6-2 195 R-R 1988-06-30 San Leandro,California MLB2007-20172013-2014
2009- 2-  50-WAS
Free Agent  
Alan KochPAlan Goodman Koch6-4 195 R-R 1938-03-25 Decatur,Alabama MLB1963-19641963-1964
1960-   UDFA-DET
 
Barney Koch2BBarnett Koch5-8 140 R-R 1923-03-23 Campbell,Nebraska MLB1944-19441944-1944    
Billy KochPWilliam Christopher Koch6-3 205 R-R 1974-12-14 Rockville Center,New York MLB1994-20041999-2004
1996- 1-   4-TOR
 
Matt KochPMatthew David Koch6-3 185 L-R 1990-11-02 Storm Lake,Iowa MLB2010-20182016-2018
2012- 3- 107-NYN
MinorsArizona Diamondbacks (AAA)
Brad KocherCBradley Wilson Kocher5-11 188 R-R 1888-01-16 White Haven,Pennsylvania MLB1912-19161912-1916    
Dick KoecherPRichard Finlay Koecher6-5 196 L-L 1926-03-30 Philadelphia,Pennsylvania MLB1946-19481946-1948    
Pete KoegelC-1BPeter John Koegel6-6 230 R-R 1947-07-31 Mineola,New York MLB1970-19771970-1972
1965- 4-  79-KC1
 
Ben KoehlerOFBenard James Koehler5-10 175 R-R 1877-01-26 Schoerndorn,Germany MLB1905-19061905-1906    
Pip KoehlerOFHorace Levering Koehler5-10 165 R-R 1902-01-16 Gilbert,Pennsylvania MLB1925-19251925-1925    
Tom KoehlerPThomas R. Koehler6-4 247 R-R 1986-06-29 Bronx,New York MLB2005-20172012-2017
2008-18- 538-FLO
DL-60Los Angeles Dodgers (MLB)
Brian Koelling2B-SSBrian Wayne Koelling6-1 185 R-R 1969-06-11 Cincinnati,Ohio MLB1991-19971993-1993
1991-14- 379-CIN
 
Len KoeneckeOFLeonard George Koenecke5-11 180 L-R 1904-01-18 Baraboo,Wisconsin MLB1932-19351932-1935    
Mark KoenigSS-3BMark Anthony Koenig6-0 180 B-R 1902-07-19 San Francisco,California MLB1925-19951925-1936    
Will KoenigsmarkPWilliam Thomas Koenigsmark6-4 180 R-R 1896-02-27 Waterloo,Illinois MLB1919-19191919-1919    
Elmer KoestnerPElmer Joseph Koestner6-1 175 R-R 1885-11-30 Piper City,Illinois MLB1910-19141910-1914    
Henry Kohler3B-1BHenry C. Kohler   - 1852-05-05 Baltimore,Maryland MLB1871-18741871-1874    
Joe KohlmanPJoseph James Kohlman6-0 160 R-R 1913-01-28 Philadelphia,Pennsylvania MLB1937-19381937-1938    
Ryan KohlmeierPRyan Lyle Kohlmeier6-2 223 R-R 1977-06-25 Salina,Kansas MLB1996-20042000-2001
1996-14- 411-BAL
 
Michael KohnPMichael Thomas Kohn6-2 205 R-R 1986-06-26 Camden,South Carolina MLB2005-20172010-2015
2008-13- 409-ANA
Free Agent  
Dick KokosOFRichard Jerome Kokos5-8 170 L-L 1928-02-26 Chicago,Illinois MLB1948-19541948-1954    
Adam KolarekPAdam John Kolarek6-3 210 L-L 1989-01-14 Baltimore,Maryland MLB2008-20182017-2018
2010-11- 332-NYN
ActiveTampa Bay Rays (MLB)
Player NamePosProper NameHt Wt B-T BornDate Place HiLvlStat YearsMLB YearsDraft InformationStatusCurrent Org (Level)
Brandon KolbPBrandon Charles Kolb6-1 190 R-R 1973-11-20 Oakland,California MLB1993-20042000-2001
1995- 4-  89-SDN
 
Danny KolbPDaniel Lee Kolb6-4 215 R-R 1975-03-29 Sterling,Illinois MLB1995-20081999-2007
1995- 6- 150-TEX
 
Eddie KolbPEdward William Kolb   R-R 1880-07-20 Cincinnati,Ohio MLB1899-18991899-1899    
Gary KolbOF-CGary Alan Kolb6-0 195 L-R 1940-03-13 Rock Falls,Illinois MLB1960-19691960-1969
1960-   UDFA-SLN
 
Don Kolloway2B-1BDonald Martin Kolloway6-3 200 R-R 1918-08-04 Posen,Illinois MLB1940-19531940-1953    
Ray KolpPRaymond Carl Kolp5-10 187 R-R 1894-10-01 New Berlin,Ohio MLB1921-19341921-1934    
Hal KolstadPHarold Everette Kolstad5-9 190 R-R 1935-06-01 Rice Lake,Wisconsin MLB1962-19631962-1963
1957-   UDFA-BOS
 
Erik KomatsuOFErik Jordan Komatsu5-10 190 L-L 1987-10-01 Camarillo,California MLB2006-20152012-2012
2008- 8- 248-MIL
Free Agent  
Shane KominePShane Kenji Komine5-8 160 R-R 1980-10-18 Honolulu,Hawaii MLB1999-20092006-2007
2002- 9- 278-OAK
 
Satoru KomiyamaPSatoru Komiyama6-2 195 R-R 1965-09-15 Chiba,Japan MLB1990-20092002-2002
2001-   UDFA-NYN
 
Fred KommersOFFrederick Raymond Kommers6-0 175 L-R 1886-03-31 Chicago,Illinois MLB1913-19131913-1913    
Brad KomminskOFBrad Lynn Komminsk6-2 205 R-R 1961-04-04 Lima,Ohio MLB1979-19971983-1991
1979- 1-   4-ATL
 
Paul Konerko1B-DHPaul Henry Konerko6-3 211 R-R 1976-03-05 Providence,Rhode Island MLB1994-20141997-2014
1994- 1-  13-LAN
Retired  
Ed Konetchy1BEdward Joseph Konetchy6-2 195 R-R 1885-09-03 La Crosse,Wisconsin MLB1907-19211907-1921    
Doug KoniecznyPDouglas James Konieczny6-4 220 R-R 1951-09-27 Detroit,Michigan MLB1971-19781973-1977
1971- 1-   3-HOU
 
Alex KonikowskiPAlexander James Konikowski6-1 187 R-R 1928-06-08 Throop,Pennsylvania MLB1948-19541948-1954    
Mike KonnickC-SSMichasel Aloysius Konnick5-9 180 R-R 1889-01-13 Glen Lyon,Pennsylvania MLB1909-19101909-1910    
Bruce Konopka1BBruno Bruce Konopka6-2 190 L-L 1919-09-16 Hammond,Indiana MLB1942-19461942-1946    
Jim KonstantyPCasimir James Kosntanty6-1 202 R-R 1917-03-02 Strykersville,New York MLB1944-19561944-1956    
George KontosPGeorge Nicholas Kontos6-3 215 R-R 1985-06-12 Lincolnwood,Illinois MLB2004-20182011-2018
2006- 5- 164-NYA
MinorsNew York Yankees (AAA)
Dennis KonuszewskiPDennis John Konuszewski6-3 210 R-R 1971-02-04 Bridgeport,Michigan MLB1990-19971995-1995
1992- 7- 203-PIT
 
Dae-Sung KooPDae-Sung Koo6-1 185 L-L 1969-08-02 Daejeon,Korea MLB2005-20052005-2005
2005-   UDFA-NYN
 
Ernie KoobPErnest Gerald Koob5-10 160 L-L 1893-09-11 Keeler,Michigan MLB1915-19191915-1919    
Cal KooncePCalvin Lee Koonce6-1 185 R-R 1940-11-18 Fayetteville,North Carolina MLB1962-19711962-1971
1961-   UDFA-CHN
 
Graham Koonce1BGraham Clinton Koonce6-4 220 L-L 1975-05-15 El Cajon,California MLB1994-20072003-2003
1993-60-1561-DET
 
Player NamePosProper NameHt Wt B-T BornDate Place HiLvlStat YearsMLB YearsDraft InformationStatusCurrent Org (Level)
Harry Koons3BHarry M. Koons5-8 174 R-R 1862-08-18 Philadelphia,Pennsylvania MLB1884-18841884-1884    
Jerry KoosmanPJerome Martin Koosman6-2 208 R-L 1943-12-23 Appleton,Minnesota MLB1965-19851967-1985
1964-   UDFA-NYN
 
George Kopacz1BGeorge Felix Kopacz6-1 195 L-L 1941-02-26 Chicago,Illinois MLB1966-19701966-1970
1960-   UDFA-MLB
 
Larry KopfSSWilliam Lorenz Kopf5-9 160 B-R 1890-11-03 Bristol,Connecticut MLB1913-19231913-1923    
Wally Kopf3BWalter Henry Kopf5-11 168 B-R 1899-07-10 Stonington,Connecticut MLB1921-19211921-1921    
Howie KoplitzPHoward Dean Koplitz5-11 195 R-R 1938-05-04 Oshkosh,Wisconsin MLB1961-19661961-1966
1956-   UDFA-DET
 
Mike KoplovePMichael Paul Koplove6-0 160 R-R 1976-08-30 Philadelphia,Pennsylvania MLB1996-20112001-2007
1998-29- 883-ARI
 
Merlin KoppOFMerlin Henry Kopp5-8 158 B-R 1892-01-02 Toledo,Ohio MLB1915-19191915-1919    
Joe KoppeSSJoseph Koppe5-10 165 R-R 1930-10-19 Detroit,Michigan MLB1958-19651958-1965
1955-   UDFA-MLB
 
George KopshawCGeorge Karl Kopshaw5-11 176 R-R 1895-07-05 Passaic,New Jersey MLB1923-19231923-1923    
Steve KorcheckCStephen Joseph Korcheck6-1 205 R-R 1932-08-11 McClellandtown,Pennsylvania MLB1954-19591954-1959    
Bobby KoreckyPRobert John Korecky6-0 180 R-R 1979-09-16 Saline,Michigan MLB1999-20162008-2014
2002-19- 569-PHI
Free Agent  
George KorincePGeorge Eugene Korince6-3 210 R-R 1946-01-10 Ottawa,Ontario MLB1966-19671966-1967
1965-   UDFA-DET
 
John KoronkaPJohn Vincent Koronka6-1 190 L-L 1980-07-30 Clearwater,Florida MLB1998-20112005-2009
1998-12- 350-CIN
 
Jim KorwanPJames Korwan6-1 181 R-R 1874-03-04 Brooklyn,New York MLB1894-18971894-1897    
Andy KoscoOFAndrew John Kosco6-3 207 R-R 1941-10-05 Youngstown,Ohio MLB1959-19741965-1974
1959-   UDFA-DET
 
Joe Koshansky1BJoseph Steven Koshansky6-4 225 L-L 1982-05-26 Shreveport,Louisiana MLB2001-20112007-2008
2004- 6- 170-COL
 
Clem KoshorekSS-2BClement John Koshorek5-4 165 R-R 1925-06-20 Royal Oak,Michigan MLB1952-19531952-1953    
Bill KoskiPWilliam John Koski6-4 185 R-R 1932-02-06 Madera,California MLB1951-19511951-1951    
Corey Koskie3BCordel Leonard Koskie6-3 217 L-R 1973-06-28 Anola,Manitoba MLB1994-20061998-2006
1994-26- 715-MIN
 
Dave KosloPGeorge Bernard Koslo5-11 180 L-L 1920-03-31 Menasha,Wisconsin MLB1941-19551941-1955    
Kevin KoslofskiCF-RFKevin Craig Koslofski5-8 165 L-R 1966-09-24 Decatur,Illinois MLB1984-19971992-1996
1984-20- 512-KCA
 
Joe KostalPJoseph William Kostal5-6 130 R-R 1876-06-01 Chicago,Illinois MLB1896-18961896-1896    
Fred KosterOFFredercik Charles Koster5-10 165 L-L 1905-12-21 Louisville,Kentucky MLB1931-19311931-1931    
Frank Kostro3B-OFFrank Jerry Kostro6-2 190 R-R 1937-08-04 Windber,Pennsylvania MLB1962-19691962-1969
1956-   UDFA-DET
 
Player NamePosProper NameHt Wt B-T BornDate Place HiLvlStat YearsMLB YearsDraft InformationStatusCurrent Org (Level)
Casey Kotchman1BCasey John Kotchman6-3 210 L-L 1983-02-22 St. Petersburg,Florida MLB2001-20162004-2013
2001- 1-  13-ANA
Free Agent  
Mark KotsayLFMark Steven Kotsay6-0 190 L-L 1975-12-02 Whittier,California MLB1994-20131997-2013
1996- 1-   9-FLO
Free Agent  
George KottarasCGeorge Kottaras6-0 180 L-R 1983-05-16 Scarborough,Ontario MLB2003-20162008-2014
2002-20- 595-SDN
Free Agent  
Sandy KoufaxPSanford Koufax6-2 210 R-L 1935-12-30 Brooklyn,New York MLB1955-19661955-1966    
Joe KoukalikPJoseph Koukalik5-8 160 R-R 1880-03-03 Chicago,Illinois MLB1904-19041904-1904    
Lou KoupalPLouis Laddie Koupal5-11 175 R-R 1898-12-19 Tabor,South Dakota MLB1925-19371925-1937    
Kevin Kouzmanoff3BKevin Kouzmanoff6-1 200 R-R 1981-07-25 Newport Beach,California MLB2002-20142006-2014
2003- 6- 168-CLE
Free Agent  
Fabian KowalikPFabian Lorenz Kowalik5-11 185 R-R 1908-04-22 Falls City,Texas MLB1932-19361932-1936    
Brian KowitzRF-LFBrian Mark Kowitz5-10 180 L-L 1969-08-17 Baltimore,Maryland MLB1988-20001995-1995
1990- 9- 237-ATL
 
Ernie KoyOFErnest Anyz Koy6-0 200 R-R 1909-09-17 Sealy,Texas MLB1938-19421938-1942    
Al Kozar2BAlbert Kenneth Kozar5-9 173 R-R 1921-07-05 McKees Rocks,Pennsylvania MLB1948-19501948-1950    
Ben KozlowskiPBenjamin Anthony Kozlowski6-6 220 L-L 1980-08-16 Seminole,Florida MLB1999-20142002-2002
1999-12- 384-ATL
 
Pete KozmaSSPeter Michael Kozma6-0 170 R-R 1988-04-11 Owasso,Oklahoma MLB2007-20182011-2018
2007- 1-  18-SLN
MinorsDetroit Tigers (AAA)
88 player(s) listed