Right-hander Luis Severino exited the Athletics’ Friday game against the New York Yankees in West Sacramento, Calif., due to right arm soreness, and he will undergo tests on Saturday.

Severino, 32, was warming up for the start of the second inning when he suddenly walked to the back of the mound and looked toward the dugout, prompting catcher Shea Langeliers to signal to the dugout. Severino left the game following a brief discussion with a trainer and manager Mark Kotsay.

He was replaced by left-hander Jose Suarez.

After the Athletics’ 8-2 loss, Severino said he had felt shoulder tightness since facing the Los Angeles Angels on May 21, when he struck out a season-high 10 without issuing a walk in seven innings.

“I felt something during my start against the Angels, but this time it got worse with every pitch I threw,” Severino said.

Asked if he might miss next scheduled start, Severino replied, “The biggest (worry) is finding something that keeps me out a long time. We’ll see what the tests say. If the worst-case scenario is I miss one or two starts, I’m happy with that.”

Severino was initially scheduled to start against the Seattle Mariners on Tuesday, but his start was pushed back. The initial reasoning was that the A’s wanted left-handers to start against the Mariners.

Kotsay said after the Friday game, “On Tuesday when he threw his side (session). I was there for it, everything looked great and he said felt good. Wednesday felt good.

“Obviously, when you ramp it up and you go into competition, you just don’t know how it’s going to respond. After the first inning, when he went out to warm up, he felt like it was still tight and couldn’t get loose and we made a decision to shut him down.”

Severino gave up four runs — all unearned — in the first inning due to a throwing error by first baseman Nick Kurtz. Aaron Judge had an RBI single, and Paul Goldschmidt drilled a three-run homer. New York led the rest of the way, so Severino was tagged with the loss.

Severino pitched for the Yankees from 2015-23, and the right-hander had been treated rudely by his former teammates entering Friday, compiling an 0-2 record and a 10.66 ERA in three starts. He is in his second season with the Athletics after spending 2024 with the New York Mets.

Through 12 starts this year, Severino is 2-6 with a 4.16 ERA.

–Field Level Media