In 1951, Seminick was beaned by a Max Lanier fastball, diminishing his ability to play. He was traded to the Cincinnati Reds for catcher Smoky Burgess, playing there from 1952 until the early part of the 1955 season. In 1955, he was once again traded for Burgess, returning to the Phillies, where he led National League catchers with a .994 fielding percentage. He played two more years before ending his playing career at the age of 36 after the 1957 season.