- Ronnie Coleman:
Six previous appearances which includes 1992 (16th), 1994 (15th), 1995 (11th), 1996 (6th), 1997 (9th), and 1998 (1st).
- Ken 'Flex' Wheeler:
Four previous appearances which includes 1993 (2nd), 1995 (8th), 1996 (4th), 1998 (2nd). Ken was slated to be in the 1997 Mr. Olympia but withdrew due to injury a few days before the contest.
- Chris Cormier:
Five previous appearances which includes 1994 (6th), 1995 (6th), 1996 (7th), 1997 (8th), and 1998 (6th).
- Kevin Levrone:
Seven previous appearances which includes 1992 (2nd), 1993 (5th), 1994 (3rd), 1995 (2nd), 1996 (3rd), 1997 (4th), and 1998 (4th).
- Shawn Ray:
Ten previous appearances which includes 1988 (13th), 1990 (3rd), 1991 (5th), 1992 (4th), 1993 (3rd), 1994 (2nd), 1995 (4th), 1996 (2nd), 1997 (3rd), and 1998 (5th).
- Nasser El Sonbaty:
Five previous appearances which includes 1994 (7th), 1995 (3rd), 1996 (disq.), 1997 (2nd), and 1998 (3rd).
- Paul Dillett:
Five previous appearances which includes 1993 (6th), 1994 (4th), 1996 (5th), 1997 (6th), and 1998 (withdrew).
- Lee Priest:
Two previous appearances which includes 1997 (6th), and 1998 (7th).
- Dexter Jackson:
No previous appearances. This is his first Mr. Olympia.
- Milos Sarcev:
Six previous appearances which includes 1991 (16th), 1992 (16th), 1993 (11th), 1994 (11th), 1997 (10th), and 1998 (11th).
- Mike Matarazzo:
Five previous appearances which includes 1991 (16th), 1993 (16th), 1996 (13th), 1997 (13th), and 1998 (9th),
- Markus Ruhl:
No previous appearances. This is his first Mr. Olympia.
- Ernie Taylor:
One previous appearances which includes 1998 (8th).
- Pavol Jablonicky:
Three previous appearances which includes 1989 (16th), 1991 (16th), and 1995 (15th).
- Jay Cutler:
No previous appearances. This is his first Mr. Olympia.
- Jean Pierre Fux:
Three previous appearances which includes 1996 (8th), 1997 (7th), and 1998 (10th).
- Porter Cottrell:
Three previous appearances which includes 1992 (8th), 1994 (5th), and 1995 (withdrew).
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