 After his first four games, he developed a reputation for his quick pitching, with baseball games ending half an hour earlier on average on days he pitched.On May 9, his complete game eleven inning victory over the Chicago White Sox improved Gromek's record to 5–0 with a 1.72 ERA, making him the first pitcher in the league with five wins.He also became the first to seven wins in mid-May, but then went on five-game losing streak, not winning game eight until June 15 against the Red Sox.