Due to personal time constraints, this is a reprint from last year, which was a reprint from the year before, which has not been updated.
Cub Stricker (1859)
Van Lingle Mungo (1911)
Del Ennis (1925)
Eddie Gaedel (1925)
George Brunet (1935)
Joe Grzenda (1937)
Pete Magrini (1942)
Mark Belanger (1944)
Lenn Sakata (1954)
Don Robinson (1957)
Carmelo Castillo (1958)
Britt Burns (1959)
Kevin Gross (1961)
John Gibbons (1962)
Kevin Ritz (1965)
Dave Mlicki (1968)
T. J. McFarland (1989)
Sadly, Cub Stricker never played for the Cubs.
3' 7" Eddie Gaedel is the shortest person to play in a major league game, walking in his only plate appearance as part of a Bill Veeck promotion. His great-nephew, Kyle Gaedele, was an outfielder in the Padres organization from 2011-15, reaching AA. Kyle is listed at 6' 3".