Myron Frederick "Moose" Grimshaw (November 30, 1875 – December 11, 1936) was a right fielder in Major League Baseball who played from 1905 through 1907 for the Boston Americans. Listed at 6 ft 1 in (1.85 m), 173 lb., Grimshaw was a switch-hitter and threw right-handed. He was born in St. Johnsville, New York, but raised in Canajoharie, New York. In a three-season career, Grimshaw was a .256 hitter (229-for-894) with four home runs and 116 RBI in 259 games, including 104 runs, 31 doubles, 16 triples, and 15 stolen bases.