Didn't Bill Veeck bring back Minnie Minoso for one White Sox appearance, with his age in the late 50's? I was a kid, so I believe it was in the early 1980's.
EDIT: Doesn't say in wiki that he was the oldest to play, though.
In 1976, after several years playing in Mexico, Miñoso returned to MLB to play three games with the White Sox. He picked up one single in eight at bats, becoming, at age 50, the second-oldest player ever to get a base hit in the Major Leagues (Hall of Famer Jim O'Rourke was the oldest when he hit safely at age 54 on September 22, 1904). Miñoso then returned to appear in two more games with the Sox in 1980. His five stints with Chicago cemented his image as a local baseball icon for at least three generations of White Sox fans
He is one of just two players in Major League history to play in five separate decades (1940s-1980s), the other being Nick Altrock. With brief appearances with the independent Northern League's St. Paul Saints in 1993 and 2003, Miñoso is the only player to have played professionally in seven different decades. He was also the last Major Leaguer to have played in the 1940s to play a Major League game.
I don't care what Tommy Lasorda says about "bleeding Dodger blue".......everyone knows that blood is red, and
I BLEED CARDINAL RED!