Michael Joseph Kilroy (November 4, 1869 – October 2, 1960) was a Major League Baseball pitcher. He was the brother of Matt Kilroy. Kilroy played two seasons in the Majors, with the Baltimore Orioles in 1888 and the Philadelphia Phillies in 1891. He pitched four career games with an 0–3 record and an ERA of 9.00. His brother, Matt, also played in the majors.

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