William Joseph Moisan, Jr. (July 30, 1925 – April 9, 2010) was a pitcher in Major League Baseball who played briefly for the Chicago Cubs during the 1953 season.

He graduated at Sanborn Seminary, Kingston, and went on to attend McIntosh Business College before entering military service in December 1943.

Due to the nature of his injury and his inability to remain as a first baseman, he had the Cubs' support when he made the decision to transition to a pitcher.

[4] In his professional debut, Moisan posted a combined record of 15–12 and a 3.11 earned run average in 36 games while pitching in the PONY and Tri-State leagues.

Following his playing retirement, Moisan remained involved with baseball for a significant number of years, mainly coaching teams near his home in New Hampshire.