Nobody shot out of the gate quicker than Fred Lynn, as he made history when in 1975, he became the first player in Major League history to win the Rookie of the Year and the MVP in the same season.  As the other one who accomplished that feat was Ichiro Suzuki, who was already an established veteran of the Japanese Leagues, this is a beyond spectacular achievement.

A Cleveland Indian for his entire career, Mel Harder debuted for the Tribe in 1928, where he was used in relief in his first two seasons when he was on their main roster and not in the minors.

The Major League career of Johnny Sain began in 1942, where he had a fairly uneventful season with a 4-7 record for the Boston Braves.  Like so many other baseball players, Sain served in the U.S. Military during World War II, and he lost three years on the diamond.  When he returned to Boston, he quickly became one of the most recognized Pitchers in the game.

297 Wins.