Coscarart also was a member of the Brooklyn team that faced the New York Yankees in the 1941 World Series, but as his hitting declined, he was replaced by Billy Herman and then traded to the Pittsburgh Pirates before the 1942 season.[2]
In his first year with Pittsburgh, Coscarart started at shortstop and switched to second base for the next three seasons. In 1944 he hit .264 with 30 doubles and 10 stolen bases in 139 games and also posted career-numbers in hits (146) and doubles (30). He then was named to the National League All-Star team but did not appear in the game.[2][3]
In 1996, Coscarart was inducted into the Brooklyn Dodgers Hall of Fame. The same year, he joined Frank Crosetti, Dolph Camilli, Al Gionfriddo, and 72 other players from his era, in suing major league baseball for lost benefits and rights of players to receive royalties for use of their images and memorabilia without the players consent. "There's no way of proving it, but I've always felt I was cheated", Coscarart said in an interview with The San Diego Union-Tribune.[4][5]
A few months later, Coscarart died in 2002 of an aneurysm in his home of Escondido, California at the age of 89.[3]
