Kevin Millar tasted Major League Baseball when the low minor league player was a replacement player in the 1995 Spring Training Games. It kept him from ever joining the Player’s Union, but it did not keep him from eventually reaching the Majors, first doing so in 1998 for a pair of Games. The year after, he was a regular on the roster.
Millar gained more playing time in 1999 and 2000 and was the primary starter for the Marlins in the two years after. He batted over .300 and slugged over .500 in both seasons (.314 & .306) and showed moderate power, with a 20-Home Run year in 2001. Millar's contract was sold to Boston in 2003, and he accumulated 443 Hits with a .296 Batting Average for the Marlins.