1990-12-19 | Mike Dalton | Signed as Free Agent by Tigers. | P | 6-0 | 215 | R | L | 1963-03-27 | Palo Alto,CA | 1983- 15- 385-BOS
| MLB | 1991-1991 | 1983-1993 |
1990-12-19 | Dan Petry | Signed as Free Agent by Tigers. | P | 6-4 | 200 | R | R | 1958-11-13 | Palo Alto,CA | 1976- 4- 74-DET
| MLB | 1979-1991 | 1976-1991 |
1990-12-05 | Tony Bernazard | Signed as Free Agent by Tigers. | 2B-SS | 5-9 | 160 | B | R | 1956-08-24 | Caguas,PR | 1973- 0- 0-MON
| MLB | 1979-1991 | 1974-1991 |
1990-12-05 | Mike Schwabe | Released by Tigers. | P | 6-4 | 200 | R | R | 1964-07-12 | Fort Dodge,IA | 1987- 21- 547-DET
| MLB | 1989-1990 | 1987-1992 |
1990-12-04 | Buddy Groom | Selected by Tigers from White Sox in Rule 5 minor league draft | P | 6-2 | 207 | L | L | 1965-07-10 | Dallas,TX | 1987- 12- 297-CHA
| MLB | 1992-2005 | 1987-2005 |
1990-12-03 | Buddy Groom | Selected by Tigers from White Sox in the minor league draft. | P | 6-2 | 207 | L | L | 1965-07-10 | Dallas,TX | 1987- 12- 297-CHA
| MLB | 1992-2005 | 1987-2005 |
1990-12-03 | Bill Gullickson | Signed as Free Agent by Tigers. | P | 6-3 | 215 | R | R | 1959-02-20 | Marshall,MN | 1977- 1- 2-MON
| MLB | 1979-1994 | 1977-1994 |
1990-12-01 | Johnny Paredes | Signed as Free Agent by Tigers. | 2B-OF | 5-11 | 165 | R | R | 1962-09-02 | Maracaibo,VZ | 1982- 0- 0-PHI
| MLB | 1988-1991 | 1982-1993 |
1990-11-26 | John Shelby | Signed as Free Agent by Tigers. | OF-DH | 6-1 | 175 | B | R | 1958-02-23 | Lexington,KY | 1977- 1- 19-BAL
| MLB | 1981-1991 | 1977-1992 |
1990-11-23 | Rob Deer | Signed as Free Agent by Tigers. | OF-1B | 6-3 | 210 | R | R | 1960-09-29 | Orange,CA | 1978- 4- 85-SFN
| MLB | 1984-1996 | 1978-1996 |
1990-11-19 | Boi Rodriguez | Traded by Tigers to Expos | 3B-1B | 6-0 | 165 | L | R | 1966-04-14 | Dorado Beach,PR | 1987- 4- 96-MON
| AAA | | 1987-2005 |
1990-11-19 | Dan Gakeler | Signed as Free Agent by Tigers. | P | 6-6 | 215 | R | R | 1964-05-01 | Mount Holly,NJ | 1984- 1- 3-BOS
| MLB | 1991-1991 | 1984-1995 |
1990-10-29 | Marvell Wynne | Purchased by Hanshin Tigers (Japan Central) from Cubs. | OF-2B | 5-11 | 185 | L | L | 1959-12-17 | Chicago,IL | 1978- 0- 0-KCA
| MLB | 1983-1990 | 1979-1990 |
1990-10-15 | Tom O'Malley | Purchased by Hanshin Tigers (Japan Central) from Mets. | 3B-1B | 6-0 | 195 | L | R | 1960-12-25 | Orange,NJ | 1979- 16- 408-SFN
| MLB | 1982-1990 | 1979-1998 |
1990-09-30 | Jody Davis | Released by Tigers. | C-1B | 6-3 | 210 | R | R | 1956-11-12 | Gainesville,GA | 1976- 3- 62-NYN
| MLB | 1981-1990 | 1976-1990 |
1990-09-30 | Mike Munoz | Traded by Dodgers to Tigers for Mike Wilkins. | P | 6-2 | 198 | L | L | 1965-07-12 | Baldwin Park,CA | 1986- 3- 74-LAN
| MLB | 1989-2000 | 1985-2000 |
1990-08-29 | Brian Dubois | Claimed on waivers by Orioles from Tigers. | P | 5-10 | 195 | L | L | 1967-04-18 | Joliet,IL | 1985- 4- 99-BAL
| MLB | 1989-1990 | 1985-1996 |
1990-07-28 | Walt Terrell | Signed as Free Agent by Tigers. | P | 6-2 | 205 | L | R | 1958-05-11 | Jeffersonville,IN | 1980- 33- 764-TEX
| MLB | 1982-1992 | 1980-1993 |
1990-07-15 | Ed Romero | Released by Tigers. | SS-2B | 5-11 | 180 | R | R | 1957-12-09 | Santurce,PR | 1975- 0- 0-MIL
| MLB | 1977-1990 | 1976-1991 |
1990-07-12 | Matt Kinzer | Released by Tigers. | P | 6-2 | 210 | R | R | 1963-06-17 | Indianapolis,IN | 1984- 2- 35-SLN
| MLB | 1989-1990 | 1984-1990 |
1990-06-18 | Tracy Jones | Traded by Tigers to Mariners for Darnell Coles. | OF-DH | 6-3 | 220 | R | R | 1961-03-31 | Hawthorne,CA | 1983- 1- 1-CIN
| MLB | 1986-1991 | 1983-1992 |
1990-06-18 | Kenny Williams | Claimed on waivers by Blue Jays from Tigers. | OF-3B | 6-1 | 184 | R | R | 1964-04-06 | Berkeley,CA | 1985- 1- 26-DET
| MLB | 1986-1991 | 1982-1992 |
1990-06-18 | Darnell Coles | Traded by Mariners to Tigers for Tracy Jones. | 3B-SS | 6-1 | 185 | R | R | 1962-06-02 | San Bernardino,CA | 1980- 1- 6-SEA
| MLB | 1983-1997 | 1980-1997 |
1990-06-13 | John Shelby | Signed as Free Agent by Tigers. | OF-DH | 6-1 | 175 | B | R | 1958-02-23 | Lexington,KY | 1977- 1- 19-BAL
| MLB | 1981-1991 | 1977-1992 |
1990-06-09 | Steve Lombardozzi | Signed as Free Agent by Tigers. | 2B-SS | 6-0 | 175 | R | R | 1960-04-26 | Malden,MA | 1981- 9- 218-MIN
| MLB | 1985-1990 | 1981-1990 |
1990-06-04 | Clay Parker | Traded by Yankees with Lance McCullers to Tigers for Matt Nokes. | P | 6-1 | 185 | R | R | 1962-12-19 | Columbia,LA | 1985- 15- 373-SEA
| MLB | 1987-1992 | 1982-1995 |
1990-06-04 | Matt Nokes | Traded by Tigers to Yankees for Clay Parker and Lance McCullers. | C-DH | 6-1 | 190 | L | R | 1963-10-31 | San Diego,CA | 1981- 20- 503-SFN
| MLB | 1985-1995 | 1981-2002 |
1990-06-04 | Lance McCullers | Traded by Yankees with Clay Parker to Tigers for Matt Nokes. | P | 6-1 | 218 | B | R | 1964-03-08 | Tampa,FL | 1982- 2- 41-PHI
| MLB | 1985-1992 | 1982-1993 |
1990-05-28 | Jody Davis | Signed as Free Agent by Tigers. | C-1B | 6-3 | 210 | R | R | 1956-11-12 | Gainesville,GA | 1976- 3- 62-NYN
| MLB | 1981-1990 | 1976-1990 |
1990-04-08 | Urbano Lugo | Signed as Free Agent by Tigers. | P | 6-0 | 185 | R | R | 1962-08-12 | Puerto Fijo,VZ | 1982- 0- 0-CAL
| MLB | 1985-1990 | 1982-1990 |
1990-04-08 | Mark Salas | Signed as Free Agent by Tigers. | C-OF | 6-0 | 205 | L | R | 1961-03-08 | Montebello,CA | 1979- 18- 448-SLN
| MLB | 1984-1991 | 1979-1991 |
1990-04-03 | Boi Rodriguez | Traded by Expos to Tigers April 3 1990 | 3B-1B | 6-0 | 165 | L | R | 1966-04-14 | Dorado Beach,PR | 1987- 4- 96-MON
| AAA | | 1987-2005 |
1990-04-02 | Wayne Housie | Released by Tigers. | OF-2B | 5-9 | 165 | B | R | 1965-05-20 | Hampton,VA | 1986- 8- 199-DET
| MLB | 1991-1993 | 1986-1995 |
1990-04-02 | Jerry Don Gleaton | Traded by Royals to Tigers for Greg Everson. | P | 6-3 | 210 | L | L | 1957-09-14 | Brownwood,TX | 1979- 1- 17-TEX
| MLB | 1979-1992 | 1979-1993 |
1990-03-30 | Lou Frazier | Traded by Astros to Tigers for Doug Strange. | OF-SS | 6-2 | 175 | B | R | 1965-01-26 | St. Louis,MO | 1986- 1- 5-HOU
| MLB | 1993-1998 | 1986-1999 |
1990-03-30 | Doug Strange | Traded by Tigers to Astros for Lou Frazier. | 3B-2B | 6-1 | 188 | B | R | 1964-04-13 | Greenville,SC | 1985- 7- 184-DET
| MLB | 1989-1998 | 1985-2000 |
1990-03-07 | Felipe Lira | Signed as nondrafted free agent by Tigers | P | 6-0 | 170 | R | R | 1972-04-26 | Miranda,VZ | 1990- 0- 0-DET
| MLB | 1995-2001 | 1990-2008 |
1990-02-20 | Felipe Lira | Signed as undrafted amateur Free Agent by Tigers. | P | 6-0 | 170 | R | R | 1972-04-26 | Miranda,VZ | 1990- 0- 0-DET
| MLB | 1995-2001 | 1990-2008 |
1990-01-22 | Dan Petry | Signed as Free Agent by Tigers. | P | 6-4 | 200 | R | R | 1958-11-13 | Palo Alto,CA | 1976- 4- 74-DET
| MLB | 1979-1991 | 1976-1991 |
1990-01-15 | Cecil Fielder | Signed as Free Agent by Tigers. | 1B-DH | 6-3 | 240 | R | R | 1963-09-21 | Los Angeles,CA | 1982- 4- 67-KCA
| MLB | 1985-1998 | 1982-1998 |
1990-01-15 | Ed Romero | Signed as Free Agent by Tigers. | SS-2B | 5-11 | 180 | R | R | 1957-12-09 | Santurce,PR | 1975- 0- 0-MIL
| MLB | 1977-1990 | 1976-1991 |
1990-01-10 | Larry Sheets | Traded by Orioles to Tigers for Mike Brumley. | OF-DH | 6-4 | 210 | L | R | 1959-12-06 | Staunton,VA | 1978- 2- 29-BAL
| MLB | 1984-1993 | 1978-1993 |
1990-01-10 | Mike Brumley | Traded by Tigers to Orioles for Larry Sheets. | SS-OF | 5-10 | 165 | B | R | 1963-04-09 | Oklahoma City,OK | 1983- 2- 33-BOS
| MLB | 1987-1995 | 1983-1996 |