Los Angeles Angels reliever Keynan Middleton has been diagnosed with damage to the ulnar collateral ligament in his right elbow.

After undergoing an MRI, Middleton is seeking a second opinion. The Angels have placed him on the 10-day disabled list.

Middleton leads the Angels with six saves. He has a 2.04 ERA in 17 2/3 innings over 16 appearances, with 16 strikeouts and nine walks.