| Player History |
| 06/01/1989 | Drafted in the 1989 first-year player draft (Round 1, Pick 5, 5th overall pick) by the Houston Astros. |
| 06/19/1989 | Was selected to the 1989 MLB Double A All-Star Game. |
| 01/01/1990 | OSA scouting updated ratings (potential): Stuff: 2 (6); Movement: 5 (8); Control: 3 (8). |
| 04/02/1990 | Named the #13 prospect in the MLB |
| 06/18/1990 | Was selected to the 1990 MLB Double A All-Star Game. |
| 01/01/1991 | OSA scouting updated ratings (potential): Stuff: 4 (6); Movement: 5 (8); Control: 4 (8). |
| 04/08/1991 | Named the #12 prospect in the MLB |
| 07/17/1991 | Injured (back tightness), out for 1-2 weeks. |
| 11/18/1991 | Received a 1-year contract worth a total of $138,994 through automatic renewal. |
| 01/01/1992 | OSA scouting updated ratings (potential): Stuff: 4 (6); Movement: 6 (8); Control: 6 (8). |
| 04/06/1992 | Named the #9 prospect in the MLB |
| 04/19/1992 | Pitches a 6-hit shutout against the Omaha Royals with 7 strikeouts and 5 BB allowed! |
| 05/25/1992 | Pitches a 6-hit shutout against the Indianapolis Indians with 6 strikeouts and 0 BB allowed! |
| 06/01/1992 | Wins the MLBAAA IL Pitcher of the Month Award. |
| 06/04/1992 | Pitches a 4-hit shutout against the Fresno Grizzlies with 8 strikeouts and 1 BB allowed! |
| 06/14/1992 | Pitches a 6-hit shutout against the Sacramento River Cats with 8 strikeouts and 1 BB allowed! |
| 06/22/1992 | Was selected to the 1992 MLB Triple A All-Star Game. |
| 07/29/1992 | Pitches a 6-hit shutout against the Sacramento River Cats with 10 strikeouts and 1 BB allowed! |
| 08/01/1992 | Wins the MLBAAA IL Pitcher of the Month Award. |
| 08/24/1992 | Pitches a 3-hit shutout against the Tacoma Rainiers with 5 strikeouts and 1 BB allowed! |
| 09/08/1992 | Pitches a 4-hit shutout against the Cincinnati Reds with 5 strikeouts and 4 BB allowed! |
| 11/19/1992 | Received a 1-year contract worth a total of $145,714 through automatic renewal. |
| 01/01/1993 | OSA scouting updated ratings (potential): Stuff: 5 (6); Movement: 7 (8); Control: 7 (8). |
| 04/05/1993 | Named the #5 prospect in the MLB |
| 11/17/1993 | Received a 1-year contract worth a total of $152,434 through automatic renewal. |
| 01/01/1994 | OSA scouting updated ratings (potential): Stuff: 5 (6); Movement: 7 (8); Control: 7 (8). |
| 05/05/1994 | Pitches a 4-hit shutout against the Cincinnati Reds with 6 strikeouts and 3 BB allowed! |
| 08/05/1994 | Pitches a 5-hit shutout against the San Francisco Giants with 10 strikeouts and 0 BB allowed! |
| 08/20/1994 | Pitches a 6-hit shutout against the Montreal Expos with 9 strikeouts and 3 BB allowed! |
| 11/22/1994 | Received a 1-year contract worth a total of $159,154 through automatic renewal. |
| 01/01/1995 | OSA scouting updated ratings (potential): Stuff: 5 (6); Movement: 8 (8); Control: 7 (8). |
| 04/28/1995 | Injured (bruised thigh), day-to-day for 4 days. |
| 06/13/1995 | Pitches a 2-hit shutout against the Philadelphia Phillies with 3 strikeouts and 2 BB allowed! |
| 06/27/1995 | Signed a 1-year contract extension worth a total of $1,129,500 with the Houston Astros organization. |
| 07/01/1995 | Wins the MLB NL Pitcher of the Month Award. |
| 08/02/1995 | Pitches a 4-hit shutout against the St. Louis Cardinals with 5 strikeouts and 4 BB allowed! |
| 09/01/1995 | Wins the MLB NL Pitcher of the Month Award. |
| 09/05/1995 | Pitches a 5-hit shutout against the Cincinnati Reds with 7 strikeouts and 1 BB allowed! |
| 09/15/1995 | Injured (sore thumb), day-to-day for 3 days. |
| 12/05/1995 | Signed a 1-year contract extension worth a total of $1,275,000 with the Houston Astros organization. |
| 01/01/1996 | OSA scouting updated ratings (potential): Stuff: 5 (6); Movement: 7 (7); Control: 8 (8). |
| 09/17/1996 | Injured (elbow soreness), out for 2 weeks. |
| 12/23/1996 | Signed a 1-year contract extension worth a total of $2,110,000 with the Houston Astros organization. |
| 01/01/1997 | OSA scouting updated ratings (potential): Stuff: 6 (6); Movement: 8 (8); Control: 8 (8). |
| 01/01/1998 | OSA scouting updated ratings (potential): Stuff: 6 (6); Movement: 8 (8); Control: 8 (8). |
| 01/13/1998 | Signed a 1-year contract extension worth a total of $2,700,000 with the Houston Astros organization. |
| 06/24/1998 | Was selected to the 1998 Major League Baseball All-Star Game. |