He appeared in the 1920 World Series with the Brooklyn Robins where he was one of three outs in Bill Wambsganss's unassisted triple play.

Kilduff was one of three players from tiny Weir City, Kansas to come to the majors in the early twentieth century.

When Buck Herzog was injured, the 1917 New York Giants called Kilduff up to play second base.

Over his ten seasons in the minors, he also played five with the San Francisco Seals (1022-1926) in the Pacific Coast League with 487 RBI's and 57 home runs, and winning the PCL championship in 1922, 1923 and 1925, winning the 1923 Pennant and came within a game and a half of the 1924 pennant.

In 428 games over five seasons in the majors, Kilduff posted a .270 batting average (374-for-1384) with 163 runs, 62 doubles, 28 triples, 4 home runs, 160 RBIs, 28 stolen bases, 134 bases on balls, .338 on-base percentage and .364 slugging percentage.