Arizona Diamondbacks left-hander Robbie Ray was placed on the 10-day Injured List, the team announced on Thursday afternoon via Twitter.

Ray pitched just two innings in Wednesday night’s loss to the Colorado Rockies, leaving the game due to back spasms. He will undergo an MRI sometime on Thursday.

The Diamondbacks essentially declared Ray their ace after they dealt Zack Greinke to the Houston Astros, despite the fact that Ray himself was thought to be one of the most coveted arms on the trade block.

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Through his first 26 starts, Ray had posted a 3.99 with a sterling 11.9 K/9, although the opposing walk rate (4.0 BB/9) was slightly concerning. The 27-year-old still has another year of arbitration before he can become a free agent after the 2020 season, a factor that surely drove up his trade value before the Diamondbacks elected to retain him at the deadline.

Arizona undoubtedly hopes that this will be a short-term absence. They entered Thursday night’s game against the San Francisco Giants just 3.5 games out of a Wild Card spot, and their schedule is relatively friendly the rest of the way.

Though the Diamondbacks traded Greinke, they hoped to reposition by acquiring the likes of Mike Leake and Zac Gallen. The results have been mixed. Arizona is 7-5 through their first 12 games in August, and Gallen has had a pair of decent outings. Leake, on the other hand, has given up 10 earned runs in his first two starts.

Still, led by Ketel Marte and a potent offense, the Diamondbacks have an excellent chance to make the playoffs if Ray can return fully healthy for the stretch run.