Gregg Olson Autograph Authentication Services | Specializing in Gregg Olson Autograph Authentication | Gregg Olson Autograph, Autographs, Autographed, Signed, Authenticated, Authentic, Authenticity, Rackrs Authentication
| Team | Start | End |
|---|---|---|
| Arizona Diamondbacks | 1998 | 1999 |
| Atlanta Braves | 1994 | |
| Baltimore Orioles | 1988 | 1993 |
| Cleveland Indians | 1995 | |
| Detroit Tigers | 1996 | |
| Houston Astros | 1996 | |
| Kansas City Royals | 1997 | |
| Kansas City Royals | 1995 | |
| Los Angeles Dodgers | 2000 | 2001 |
| Minnesota Twins | 1997 |
