Martin Joseph Kavanagh (June 13, 1891 – July 28, 1960) was an American baseball player. He played professional baseball for six years from 1913 to 1918, including five seasons in Major League Baseball with the Detroit Tigers (1914–1916, 1918), Cleveland Indians (1916–1917), and St. Louis Cardinals (1918). He appeared in 370 major league games, 172 as a second baseman, 73 as a first baseman, 23 as an outfielder, three as a third baseman, and two as a shortstop. During his major league career, he compiled a .249 batting average and a .330 on-base percentage.