| 07/11/1985 | Drafted in the 1985 first-year player draft (Round 3, Pick 25, 77th overall pick) by the Seattle Mariners. |
| 07/25/1985 | Signed a minor league contract with the Seattle Mariners organization with a signing bonus of $130,000. |
| 01/01/1986 | OSA scouting updated ratings (potential): Contact: 54 (68); Power: 24 (66); Eye: 38 (42). |
| 04/14/1986 | Named the #62 prospect in the ML |
| 05/15/1986 | Injured (mild hamstring strain), day-to-day for 1 day. |
| 06/04/1986 | Was selected to the 1986 ML Triple A All-Star Game. |
| 12/01/1986 | Received a 1-year contract worth a total of $300,000 through automatic renewal. |
| 01/01/1987 | OSA scouting updated ratings (potential): Contact: 77 (95); Power: 31 (87); Eye: 48 (66). |
| 04/06/1987 | Named the #19 prospect in the ML |
| 06/29/1987 | Injured (back stiffness), out for 1-2 weeks. |
| 07/13/1987 | Injured (mild hamstring strain), day-to-day for 2 days. |
| 07/29/1987 | Goes 5-5 against the Vancouver Brewers, with 1 2B, 2 RBI and 2 R. |
| 11/21/1987 | Received a 1-year contract worth a total of $300,000 through automatic renewal. |
| 01/01/1988 | OSA scouting updated ratings (potential): Contact: 94 (115); Power: 38 (105); Eye: 52 (80). |
| 04/28/1988 | Injured (shoulder tendinitis), out for 3-4 weeks. |
| 05/30/1988 | Injured (sprained finger), out for one week. |
| 06/25/1988 | Injured (strained groin), out for 4 weeks. |
| 08/12/1988 | Injured (fractured fibula), out for 3 months. |
| 11/24/1988 | Received a 1-year contract worth a total of $300,000 through automatic renewal. |
| 01/01/1989 | OSA scouting updated ratings (potential): Contact: 96 (119); Power: 49 (108); Eye: 52 (80). |
| 04/08/1989 | Injured (sore back), day-to-day for 5 days. |
| 05/28/1989 | Goes 5-5 against the Milwaukee Brewers, with 2 2B, 1 HR, 5 RBI and 3 R. |
| 06/01/1989 | Suspended 2 games after ejection following a brawl. |
| 06/05/1989 | Wins the ML AL Player of the Week Award. |
| 07/09/1989 | Was selected to the 1989 Major League Baseball All-Star Game. |
| 07/24/1989 | Goes 5-5 against the Chicago White Sox, with 1 2B, 4 RBI and 1 R. |
| 09/15/1989 | Injured (blurred vision), day-to-day for 1 day. |
| 10/02/1989 | Signed a 3-year contract extension worth a total of $22,500,000 with the Seattle Mariners organization. |
| 10/26/1989 | Won the 1989 Major League Baseball World Series with the Seattle Mariners! |
| 01/01/1990 | OSA scouting updated ratings (potential): Contact: 102 (119); Power: 61 (108); Eye: 53 (81). |
| 05/07/1990 | Wins the ML AL Player of the Week Award. |
| 06/18/1990 | Wins the ML AL Player of the Week Award. |
| 07/08/1990 | Was selected to the 1990 Major League Baseball All-Star Game. |
| 07/31/1990 | Injured (foot contusion), out for one week. |
| 08/11/1990 | Injured on 08/10/1990, diagnosed with a sprained ankle, is day-to-day. |
| 08/20/1990 | Injured on 08/19/1990, diagnosed with a sprained ankle, will miss 2 weeks. |
| 09/24/1990 | Wins the ML AL Player of the Week Award. |
| 09/27/1990 | Injured on 09/22/1990, diagnosed with a fractured thumb, will miss 3-4 weeks. |
| 01/01/1991 | OSA scouting updated ratings (potential): Contact: 100 (119); Power: 61 (107); Eye: 53 (82). |
| 06/29/1991 | Injured on 06/28/1991, diagnosed with a strained rib cage muscle, will miss 3 weeks. |
| 08/07/1991 | Injured (wrist soreness), out for 2 weeks. |
| 01/01/1992 | OSA scouting updated ratings (potential): Contact: 98 (119); Power: 61 (107); Eye: 54 (85). |
| 02/20/1992 | Signed a 4-year contract extension worth a total of $33,900,000 with the Seattle Mariners organization. |
| 05/17/1992 | Injured on 05/14/1992, diagnosed with a knee sprain, will miss 6 days. |
| 05/26/1992 | Injured (herniated disc (neck)), day-to-day for 2 weeks. |
| 09/08/1992 | Injured (sore elbow), day-to-day for 3 days. |
| 01/01/1993 | OSA scouting updated ratings (potential): Contact: 95 (115); Power: 61 (104); Eye: 54 (86). |
| 06/30/1993 | Injured (torn meniscus (knee)), out for 2-3 months. |
| 09/15/1993 | Suspended 6 games after ejection following arguing a strike call. |
| 01/01/1994 | OSA scouting updated ratings (potential): Contact: 92 (114); Power: 61 (103); Eye: 55 (83). |
| 05/15/1994 | Injured on 05/13/1994, diagnosed with a bruised kneecap, will miss 5-6 weeks. |
| 08/29/1994 | Injured (strained quadriceps), out for 2 weeks. |
| 10/01/1994 | Injured on 09/28/1994, diagnosed with a fractured wrist, will miss 5 weeks. |
| 01/01/1995 | OSA scouting updated ratings (potential): Contact: 90 (110); Power: 61 (100); Eye: 56 (80). |
| 03/27/1995 | Injured on 03/25/1995, diagnosed with a forearm strain, will miss 4 weeks. |
| 05/04/1995 | Injured (mild shoulder inflammation), out for 6 days. |
| 05/31/1995 | Injured (mild shoulder strain), out for 1-2 weeks. |
| 06/01/1995 | Signed a 2-year contract extension worth a total of $14,220,000 with the Seattle Mariners organization. |
| 06/22/1995 | Injured on 06/21/1995, diagnosed with a fractured hand, will miss 5 weeks. |
| 07/20/1995 | Suffered setback in recovery from injury, will miss another 1-2 weeks. |
| 09/19/1995 | Injured (back tightness), day-to-day for 2 weeks. |
| 01/01/1996 | OSA scouting updated ratings (potential): Contact: 88 (109); Power: 61 (100); Eye: 56 (79). |
| 06/05/1996 | Injured (bruised ankle), day-to-day for 5 days. |
| 06/14/1996 | Injured (sore elbow), out for one week. |
| 06/20/1996 | Was selected to the 1996 Major League Baseball All-Star Game. |
| 08/05/1996 | Wins the ML AL Player of the Week Award. |
| 09/18/1996 | Injured (separated shoulder), out for 3 weeks. |
| 01/01/1997 | OSA scouting updated ratings (potential): Contact: 88 (108); Power: 61 (98); Eye: 56 (80). |
| 03/23/1997 | Injured (ankle soreness), out for one week. |
| 04/10/1997 | Injured (shoulder soreness), out for 3-4 weeks. |
| 05/25/1997 | Injured (hamstring tendinitis), out for 3 weeks. |
| 07/17/1997 | Injured (back spasms), day-to-day for 6 days. |
| 07/21/1997 | Injured (mild shoulder strain), out for 1-2 weeks. |
| 08/11/1997 | Injured (herniated disc (back)), out for 3 weeks. |
| 09/08/1997 | Injured (sore elbow), out for 1-2 weeks. |
| 01/01/1998 | OSA scouting updated ratings (potential): Contact: 87 (106); Power: 61 (95); Eye: 56 (80). |
| 04/22/1998 | Scores his 1000th career Major League Baseball run! |
| 04/27/1998 | Wins the ML AL Player of the Week Award. |