SAN DIEGO -- Padres closer Huston Street left in the 10th inning of Friday's 9-8 loss to the Marlins in 12 innings with what the team called a posterior strain of the right shoulder.
Street got two outs in the 10th inning before walking pinch-hitter Logan Morrison. That's when he made a motion with his hand to the dugout.
Manager Bud Black and assistant athletic trainer Paul Navarro went to the mound and Street left shortly thereafter. Street hopes the injury isn't serious.
"By the end of the inning, [the pain] got a little sharper," Street said. "You know when something is not right. I just said, 'Something in there is not right.' But I don't think it's anything major."
Street, who has a 0.93 ERA and four saves in 10 games this season, said the pain radiated more from his lat muscle than the shoulder itself.
"I think that's a positive sign," he said.
Black said Street will have an MRI exam on his shoulder on Saturday.
"There is a little bit of discomfort, but we don't know the severity of it yet," Black said.