Arizona Diamondbacks standout right-hander Corbin Burnes exited Sunday’s game against the Washington Nationals in the fifth inning with an apparent arm injury.

Burnes allowed a two-out single to CJ Abrams and immediately motioned to the dugout for a trainer to come to the mound, then yelled in frustration. The conversation was brief with Burnes surely communicating that there was an issue with his pitching arm.

There was no immediate disclosure of what type of injury Burnes sustained.

Burnes gave up one run and four hits in 4 2/3 innings before his exit. He struck out six and walked one.

“It feels sad,” Arizona third baseman Eugenio Suarez said of Burnes’ departure. “He’s been pitching really well and then he left the game today with something in his elbow. I pray that we don’t miss him for a long time.”

The four-time All-Star and 2021 National League Cy Young Award winner is in his first season with the Diamondbacks after signing a six-year, $210 million deal in the offseason.

Burnes is 3-2 with a 2.66 ERA in 11 starts. He has struck out 63 in 64 1/3 innings.

Burnes is 63-38 with a 3.15 ERA and 1,114 strikeouts in 210 appearances (149 starts) in eight seasons with the Milwaukee Brewers (2018-23), Baltimore Orioles (2024) and Diamondbacks (2025).

Arizona won Sunday’s game 3-1 for just its second victory in the past 11 games.