| Player History |
| 01-01-1988 | OSA scouting updated ratings (potential): Stuff: 2 (5); Movement: 6 (6); Control: 3 (5). |
| 04-01-1988 | Named the #69 prospect in the MLB |
| 06-04-1988 | Was selected to the 1988 MLB Triple A All-Star Game. |
| 01-01-1989 | OSA scouting updated ratings (potential): Stuff: 5 (6); Movement: 5 (5); Control: 5 (6). |
| 04-01-1989 | Named the #67 prospect in the MLB |
| 06-04-1989 | Was selected to the 1989 MLB Triple A All-Star Game. |
| 08-13-1989 | Injured (strained back muscle), out for 1-2 weeks. |
| 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 (6); Movement: 4 (4); Control: 7 (8). |
| 04-01-1990 | Named the #97 prospect in the MLB |
| 11-10-1990 | Wins the 1990 MLB NL Rookie of The Year. |
| 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: 5 (5); Movement: 5 (5); Control: 7 (7). |
| 06-29-1991 | Was selected to the 1991 Major League Baseball All-Star Game. |
| 10-21-1991 | Signed a 3-year contract extension worth a total of $2,280,000 with the Pittsburgh Pirates organization. |
| 01-01-1992 | OSA scouting updated ratings (potential): Stuff: 6 (6); Movement: 6 (6); Control: 6 (7). |
| 06-29-1992 | Was selected to the 1992 Major League Baseball All-Star Game. |
| 10-27-1992 | Won the 1992 Major League Baseball World Series with the Pittsburgh Pirates! |
| 01-01-1993 | OSA scouting updated ratings (potential): Stuff: 5 (5); Movement: 5 (5); Control: 7 (7). |
| 11-14-1993 | Was traded by the Pittsburgh Pirates to the San Francisco Giants, along with 3B W. Boggs, in exchange for . |
| 01-01-1994 | OSA scouting updated ratings (potential): Stuff: 6 (6); Movement: 5 (5); Control: 8 (8). |
| 11-13-1994 | Received a 1-year contract worth a total of $912,000 through arbitration. |
| 01-01-1995 | OSA scouting updated ratings (potential): Stuff: 6 (6); Movement: 6 (6); Control: 7 (7). |
| 08-18-1995 | Signed a 1-year contract extension worth a total of $1,500,000 with the San Francisco Giants organization. |
| 01-01-1996 | OSA scouting updated ratings (potential): Stuff: 5 (5); Movement: 6 (6); Control: 8 (8). |
| 09-25-1996 | Injured (finger blister), day-to-day for 6 days. |
| 10-07-1996 | Signed a 2-year contract extension worth a total of $4,760,000 with the San Francisco Giants organization. |
| 01-01-1997 | OSA scouting updated ratings (potential): Stuff: 5 (5); Movement: 5 (5); Control: 7 (7). |
| 01-01-1998 | OSA scouting updated ratings (potential): Stuff: 6 (6); Movement: 6 (6); Control: 8 (8). |
| 06-05-1998 | Signed a 1-year contract extension worth a total of $5,630,000 with the San Francisco Giants organization. |
| 08-05-1998 | Injured (fractured elbow), out for 8 months. |