8. Edgar Renteria (1996)
Renteria is the youngest player to debut for the Marlins at only 19 years and 277 days of age. Renteria would go on to win the World Series title with the Marlins in 1997 delivering a massive walk-off hit in game seven that won the Marlins their first pennant.
Renteria’s rookie year was in 1996 where he sported a batting average of .309 along with an OPS of .757. Also adding 31 RBI’s and a .358 OBP, Renteria came in second place in the NL Rookie of the Year race, losing to future Marlin Todd Hollandsworth.
7. Miguel Cabrera (2003)
Cabrera was key to the Marlins winning the 2003 World Series, which just so happened to be his rookie season. The second-youngest player to debut for the Marlins, Cabrera slashed .268/.325/.468 with 12 HR’s and 62 RBI’s in 87 games, and even delivered a home run in his first career game.
Cabrera would explode into superstardom during the 2003 playoffs, specifically during the notorious NLCS against the Chicago Cubs batting at a .333 AVG with 3 HR’s in seven games. Cabrera would go on to become arguably the franchises greatest player, and one of the greatest hitters the league has seen.