ARLINGTON, Texas — The Rockies’ lineup, already hurting from the loss of power-hitting shortstop Trevor Story, could be losing another important player.

Veteran first baseman Mark Reynolds is likely headed to the 15-day disabled list because of an injury to his left hand. He departed Colorado’s 12-9 victory over the Rangers in the seventh inning here Thursday afternoon because of an injured hamate bone. Initial X-rays were inconclusive, and Reynolds is scheduled to undergo an MRI on Friday when the Rockies are in Philadelphia.

“It’s been hurting me for a couple of weeks,” Reynolds said. “I’ve been doing the best I could with it hurting. I tried to tape it and not feel it. But it would hurt when I would swing and miss.”

Rockies manager Walt Weiss said that Reynolds “could be headed for the DL.” If that is the case, it’s unclear what the Rockies will do to replace the first baseman, a right-handed hitter who’s batting .283 with 12 home runs and 50 RBIs. He’s also fielded his position well, regularly making scoops to cap off highlight reel plays by Gold Glove third baseman Nolan Arenado.

An obvious choice to replace Reynolds would seem to be Ben Paulsen, the first baseman for Triple-A Albuquerque who has big-league experience. However, Paulsen bats left handed and the Rockies’ lineup is already heavy with lefties.

Reynolds said he “didn’t feel a pop” in his hand Thursday afternoon, but he said the pain didn’t leave and he couldn’t swing a bat after the injury.

“It takes a lot for me to come out of a game, but I couldn’t swing,” he said, describing the injury as a “gnat at a barbecue, very annoying.”

Looking ahead

Rockies RHP Jon Gray (8-5, 4.26 ERA) at Phillies RHP Jake Thompson (0-1, 12.46 ERA), 5:30 p.m. Friday, ROOT, 850 AM

It’s rebound time for Gray, whose terrific season was derailed by a poor performance in his last outing against the Marlins. After winning his three previous starts, the rookie right-hander got shelled for eight runs on 10 hits in just 3⅔ innings. “There was nothing that went right today,” Gray said after the loss. “I didn’t pitch at all, didn’t command anything.” If the Rockies want to get back on the winning track, Gray has to pitch like the team’s ace again. Thompson, the No. 70 prospect in baseball according to MLBPipeline.com, got lit up in his major-league debut last Saturday. The Padres bashed him for six runs on seven hits in just 4⅓ innings at Petco Park.

Saturday: Rockies LHP Tyler Anderson (4-3, 3.04 ERA) at Phillies RHP Jerad Eickhoff (7-12, 3.78), 5:05 p.m; ROOT

Sunday: Rockies RHP Tyler Chatwood (10-7, 3.58) at Phillies RHP David Buchanan (8-17, 5.01) 11:35 a.m., ROOT

Monday: Nationals LHP Gio Gonzalez (8-9, 4.24) at Rockies LHP Jorge De La Rosa (7-7, 5.25), 6:40 p.m., ROOT