| Player History |
| 06-15-1987 | Drafted in the 1987 first-year player draft (Round 1, Pick 1, 1st overall Pick) by the Chicago (A) White Sox. |
| 01-01-1988 | OSA scouting updated ratings (potential): Stuff: 1 (6); Movement: 7 (8); Control: 4 (6). |
| 04-01-1988 | Named the #27 prospect in the MLB |
| 01-01-1989 | OSA scouting updated ratings (potential): Stuff: 4 (6); Movement: 6 (7); Control: 6 (7). |
| 04-01-1989 | Named the #10 prospect in the MLB |
| 05-19-1989 | Injured (flu), day-to-day for one week. |
| 11-22-1989 | Received a 1-year contract worth a total of $300,000 through automatic renewal. |
| 01-01-1990 | OSA scouting updated ratings (potential): Stuff: 6 (7); Movement: 5 (5); Control: 5 (5). |
| 04-26-1990 | Pitches a 6-hit shutout against the Milwaukee Brewers with 12 strikeouts and 4 BB allowed! |
| 06-29-1990 | Was selected to the 1990 Major League Baseball All-Star Game. |
| 11-22-1990 | Received a 1-year contract worth a total of $300,000 through automatic renewal. |
| 01-01-1991 | OSA scouting updated ratings (potential): Stuff: 7 (8); Movement: 6 (6); Control: 6 (6). |
| 09-03-1991 | Pitches a NO-HITTER against the Cleveland Indians with 15 strikeouts and 3 BB allowed! |
| 11-21-1991 | Received a 1-year contract worth a total of $300,000 through automatic renewal. |
| 01-01-1992 | OSA scouting updated ratings (potential): Stuff: 6 (6); Movement: 6 (6); Control: 5 (5). |
| 06-01-1992 | Was traded by the Chicago (A) White Sox to the Atlanta Braves in exchange for SP M. Williams, SS J. Valentin. |
| 06-20-1992 | Signed a 8-year contract extension worth a total of $34,000,000 with the Atlanta Braves organization. |
| 01-01-1993 | OSA scouting updated ratings (potential): Stuff: 7 (7); Movement: 6 (6); Control: 5 (5). |
| 01-01-1994 | OSA scouting updated ratings (potential): Stuff: 7 (7); Movement: 5 (5); Control: 6 (6). |
| 05-16-1994 | Was traded by the Atlanta Braves to the Houston Astros, along with 3B J. Blauser, in exchange for SP D. Stapleton, SS C. Jones. |
| 01-01-1995 | OSA scouting updated ratings (potential): Stuff: 7 (8); Movement: 6 (6); Control: 6 (6). |
| 04-16-1995 | Was traded by the Houston Astros to the Pittsburgh Pirates in exchange for . |
| 06-20-1995 | Was selected to the 1995 Major League Baseball All-Star Game. |
| 07-02-1995 | Pitches a NO-HITTER against the Colorado Rockies with 8 strikeouts and 1 BB allowed! |
| 08-01-1995 | Wins the MLB NL Pitcher of the Month Award. |
| 10-17-1995 | Won the 1995 Major League Baseball World Series with the Pittsburgh Pirates! |
| 01-01-1996 | OSA scouting updated ratings (potential): Stuff: 6 (7); Movement: 6 (6); Control: 6 (6). |
| 06-01-1996 | Wins the MLB NL Pitcher of the Month Award. |
| 06-20-1996 | Was selected to the 1996 Major League Baseball All-Star Game. |
| 11-05-1996 | Wins the 1996 MLB NL Cy Young. |
| 01-01-1997 | OSA scouting updated ratings (potential): Stuff: 7 (7); Movement: 5 (5); Control: 6 (6). |
| 08-15-1997 | Pitches a 2-hit shutout against the Florida Marlins with 7 strikeouts and 0 BB allowed! |
| 09-01-1997 | Wins the MLB NL Pitcher of the Month Award. |
| 11-09-1997 | Wins the 1997 MLB NL Cy Young. |
| 01-01-1998 | OSA scouting updated ratings (potential): Stuff: 5 (8); Movement: 5 (5); Control: 6 (6). |
| 05-12-1998 | Pitches a 4-hit shutout against the Colorado Rockies with 5 strikeouts and 1 BB allowed! |
| 06-09-1998 | Injured (tender elbow), day-to-day for 1-2 weeks. |