Shane Bieber has a strained right shoulder and will not pitch for at least two weeks.

The reigning American League Cy Young winner complained of tightness in his shoulder after pitching Sunday and underwent an MRI.

Bieber allowed a season-high 10 hits and five runs while losing to the Seattle Mariners on Sunday.

"Today, I got beat for not executing," Bieber said. "That's obvious. Whether it's curveball, fastball, slider, changeup, cutter, it doesn't really matter. I just got to be better and continue to hit spots, execute throughout the game, strike one, two and three and then continue momentum."

He is 7-4 this season in 14 starts covering 90 2/3 innings. He has 130 strikeouts.