Bob Mahoney's major league pitching career was brief.  After a three game stretch with the White Sox, he was traded early in the 1951 season to the Browns, where he had a rough go of it.  After 3 games in 1952 he vanished from the big league roster, never to resurface. A young hand has written and erased the word "Catcher" in the top border  and another on his cap.  A nice dark blue background is presented, a fine canvas for his PSA/DNA NM-MT autograph, rendered in matching blue ballpoint.