NEW YORK (AP) — Arizona Diamondbacks ace Zac Gallen appeared to hurt a leg and left Thursday night’s start against the New York Mets after six pitches.

The 28-year-old right-hander, who finished among the top five in NL Cy Young Award voting in each of the last two seasons, hopped when releasing a fastball to DJ Stewart, his second batter. Manager Torey Lovullo and an athletic trainer went to the mound, and Gallen limped as he walked to the dugout.

NL champion Arizona entered 25-30. The Diamondbacks already were missing right-hander Merrill Kelly, sidelined since April 15 by right shoulder inflammation, and left-hander Eduardo Rodriguez, who signed an $80 million, four-year contract as a free agent and hasn’t pitched this season because of inflammation in his pitching shoulder.

Rookie Bryce Jarvis replaced Gallen, who entered 5-2 with a 3.12 ERA in 10 starts.