Walter Joseph "Moose" Moryn (April 12, 1926 – July 21, 1996) was an American Major League Baseball outfielder.

A native of St. Paul, Minnesota, Moryn's professional baseball career began in 1948 after he served in the United States Navy in the Pacific Theater of Operations during World War II.

He stood 6 feet 2 inches (1.88 m) tall and weighed 205 pounds (93 kg), batted left-handed and threw right-handed.

Moryn appeared in 785 games played over eight big-league seasons, collecting 667 hits, with 116 doubles, 16 triples and 101 home runs.

Moryn died of a heart attack in Winfield, Illinois, at the age of 70, and is buried in Assumption Cemetery in Wheaton.