San Diego Padres starter Dinelson Lamet left his season debut Wednesday after two scoreless innings because of right forearm tightness.

Lamet will get an MRI and is considered day-to-day.

The right-hander struck out four after a single to start the game. He threw 19 strikes out of 29 pitches, reaching 97 mph on his fastball.

"He was feeling good, but it began tightening up on him in the second inning," Jayce Tingler said. "His fastball was salty today. Through all that he's been through, it's really the first setback of any kind he's had. But it's hard to simulate the adrenaline of an actual game. We'll have more info in a couple of days, but hopefully he can continue to pitch. It's day-to-day."

Lamet, 28, had not pitched since leaving his final start of 2020 with elbow discomfort and missing the playoffs.