He picked up his nickname in Spring Training as a rookie, when he went fishing, stepped on a catfish and cut his foot, causing him to miss several games. He was a reserve outfielder on the 1946 Boston Red Sox, the last Red Sox team to win 100 games. For a guy who had over 40 years to sign the card, Metkovich is very hard to find; I've only seen a couple of these since I started.
I'm now up to 152/274 (55.47 %) of the way there.