Pirates pitcher Nick Burdi exited the game in the eighth inning while clutching his right biceps and elbow in obvious pain after tossing a 96-mph fastball to Diamondbacks outfielder Jarrod Dyson.
After releasing the ball, Burdi bent over, dropped to his knees and collapsed on the mound in tears in an emotional scene.
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Burdi previously underwent Tommy John surgery in 2017.
Burdi, 26, entered Monday’s game in the seventh inning but surrendered a home run to Christian Walker before retiring Wilmer Flores. In the eighth, Burdi gave up three straight singles before Dyson came up to bat.
Through his first 10 games this season, Burdi had faced 34 batters, striking out 17 and walking two.
The 26-year-old was a second-round pick by the Twins in 2014 and fought tooth and nail to get to MLB battling command issues as well as injury problems. He made his major league debut in 2018 pitching in two games toward the end of the year.
This season marked the first opening day roster he had made.