he signed a three-year contract to play for the Pittsburgh Rebels of the Federal League. Perritt said at the time that he preferred to play for $2,000 a year for the Rebels than $10,000 a year for the Cardinals. However, New York Giants manager John McGraw entered into a trade with the Cardinals for rights to Perritt and induced Perritt to renege on his contract with the Federal League. Federal League officials reacted angrily to the Giants' signing of Perritt, noting that it "presaged a general renewal of the baseball war" for which the Federal League had set aside a $100,000 war fund. During the 1915 season, Perritt appeared in 35 games and compiled a 12-18 record with a 2.66 ERA. Perritt's record in 1915 led one writer to brand him a "gold brick", criticizing Perritt's inability to complete games (he had 16 complete games in 29 starts in 1915) and asserting that he "pitched a brand of baseball so weird that it became a joke around the circuit." In 1916, Perritt appeared in 40 games, 29 as a starter and had 17 complete games. He compiled an 18-11 record with a 2.62 ERA. On September 9, 1916, he won both games in a double-header against the defending National League champion Philadelphia Phillies. Playing in front of 37,000 spectators in New York, Perritt gave up only one run in 18 innings. Perritt had the best season of his career in 1917 as he helped the Giants win the National League pennant. That year, Perritt appeared in 35 games, compiled a 17–7 record and ranked among the National League leaders with a .708 winning percentage (third) and a 1.88 ERA (third). Despite his strong performance in the regular season, Perritt did not start any games in the 1917 World Series against the Chicago White Sox. He appeared in relief in three World Series games, giving up two earned runs in innings for a 2.16 ERA in the World Series. In 1918, Perritt posted his third consecutive season with at least 17 wins. He appeared in 35 games in 1918 and compiled an 18-13 record with a 2.74 ERA. During the three seasons from 1916 to 1918, Perritt appeared in 110 games for the Giants, started 86 games, threw 50 complete games, and compiled a 53-31 record with a 2.43 ERA. However, Perritt developed a reputation for being troublesome during his tenure