- 985 AAU Teen Mr America 1st (MT)
- 1989 NPC California Championships 1st (LHW)
- 1989 NPC Nationals 5th (LHW)
- 1990 NPC Junior Nationals 2nd (HW)
- 1991 NPC Nationals 2nd (HW)
- 1991 NPC USA Championship 2nd (HW)
- 1992 NPC USA Championships 1st (HW and Overall)
- 1993 IFBB Ironman Pro Invitational 1st
- 1993 IFBB Arnold Classic 1st
- 1993 IFBB Mr. Olympia 2nd
- 1995 IFBB Ironman Pro Invitational 1st
- 1995 IFBB Arnold Classic 2nd
- 1995 IFBB South Beach Pro 1st
- 1995 IFBB Mr. Olympia 8th
- 1995 IFBB Grand Prix Spain 5th
- 1996 IFBB Ironman Pro Invitational 1st
- 1996 IFBB Arnold Classic 2nd
- 1996 IFBB Night of Champions 1st
- 1996 IFBB Canada Pro Classic 2nd
- 1996 IFBB Florida Cup Pro 1st
- 1996 IFBB Mr. Olympia 4th
- 1997 IFBB Ironman Pro Invitational 1st
- 1997 IFBB Arnold Classic 1st
- 1997 IFBB San Jose Pro 1st
- 1998 IFBB Ironman Pro Invitational 1st
- 1998 IFBB Arnold Classic 1st
- 1998 IFBB Mr Olympia 2nd
- 1999 IFBB Grand Prix England - 2nd
- 1999 IFBB Joe Weider's Pro World 2nd
- 1999 IFBB Mr. Olympia 2nd
- 2000 IFBB Mr. Olympia 3rd
- 2000 IFBB Hungarian Grand Prix 1st
- 2000 IFBB Arnold Classic 1st
- 2000 IFBB Ironman Pro Invitational 2nd
Flex chciał być silny i dobrze zbudowany, żeby upodobnić się do facetów oglądanych przez niego w magazynach kulturystycznych.