Martin Joseph Kavanagh (June 13, 1891 – July 28, 1960) was an American baseball player.

[2] Kavanagh began his professional career in 1913 with the York White Roses of the Tri-State League.

[4] Kavanagh finished the 1914 season with a .248 batting average and 16 stolen bases in 128 games.

[1] In one of those games, on September 24, Kavanagh hit a grand slam as a pinch hitter, the first time in American League history that had happened.

[8][9] After retiring from professional baseball, Kavanagh worked as an iron worker in the construction industry.