Matthew Aloysius "Matches" Kilroy (June 21, 1866 – March 2, 1940) was an American left-handed pitcher in Major League Baseball.

[3] Although he had a disappointing record of 29 wins and 34 losses, he set a mark that was unequalled in major league pitching.

[4] During this remarkable rookie season, he hurled 5 shutouts, 3 one-hitters, and 4 two-hitters, but on October 6 he pitched the only 9-inning no-hitter of his career.

[3] Earlier, before the season started and after signing his contract with the team, he married Fanny Denny, although he did spend the honeymoon training with the Orioles.

[3] On July 29 of that season, he pitched his second no-hitter, this time a 7-inning affair against the St. Louis Browns that ended in scoreless tie.

It was Kilroy's own baserunning error that negated the only run scored, when he missed third base in the 3rd inning and was called out.

After the Players' League folded, he traveled around, playing for three teams during the next four seasons, never pitching more than 451⁄3 innings.

[1] Kilroy died at the age of 73;[6] he was buried at the Holy Sepulchre Cemetery in Cheltenham Township, Pennsylvania.