John Gabriel Walsh (March 25, 1879 – April 25, 1947) was a third baseman in Major League Baseball who played for the Philadelphia Phillies in the 1903 season. Listed at 5' 8" (1.73 m), 162 lb (73 k), he batted and threw right handed. Born in Wilkes-Barre, Pennsylvania, Walsh attended Fordham University between 1898 and 1903 and University of Notre Dame in 1901. He went on to play Class C baseball in the minor leagues in 1902, starting with the Meriden Silverites of the Connecticut State League before joining the Wilkes-Barre/Mount Carmel of the Pennsylvania State League during the midseason.