Who was the youngest Major League Baseball player to get a hit?

Answer 1

In the modern era, that was 16 year old pitcher Jim Derrington of the Chicago White Sox in 1956.

Derrington was born November 29, 1939 and debuted in MLB on September 30, 1956 starting the final game of the season for the White Sox against the Kansas City Athletics. He pitched 6 innings and gave up 9 hits and 6 runs and was credited with the loss in a 7-6 Athletics win. He got a single in his second at bat.

16 year old pitcher Rogers McKee, who was born September 16, 1926, also got a base hit playing for the 1943 Philadelphia Phillies. There are no boxscores available to determine when that base hit occurred but it is documented that he made his MLB debut on August 18, 1943. This would make him at least a month older than Derrington when he got his base hit.

Answer 2

Jim O'Rourke in 1904 at the age of 53 picked up one hit in 4 at bats.