Milwaukee Brewers right-hander Quinn Priester will undergo season-ending decompression surgery for thoracic outlet syndrome on Monday in Dallas. The pitcher is expected to be sidelined for eight to 10 months following the procedure.

Priester has been called back from his minor league rehabilitation assignment after failing to recover from the condition through non-surgical methods. Surgeon Dr. Gregory Pearl will perform the operation, which involves the removal of the first upper rib on the right side.

"When the brain and arm are communicating the right way because of the nerves that are pinching in there, it makes it nearly impossible to actually create a result that's repeatable," Priester said. Priester noted that nerve blocks alleviated pain but could not fully alleviate all symptoms. Priester remains on the 60-day injured list and has not pitched in the majors this season.

In five rehabilitation games across Triple-A Nashville, Arizona, and High-A Wisconsin, Priester recorded a 15.75 ERA and a 2.88 WHIP over 16 innings. During those appearances, he issued 24 walks, recorded 18 strikeouts, hit four batters, and threw six wild pitches. Thoracic outlet syndrome occurs when blood vessels or nerves in the space between the collarbone and first rib are compressed; Priester's condition involves a nerve, not blood vessels, and he continues to feel discomfort.

"I feel really confident that I'm going to come back even better," Priester said, noting he hopes to compete for a rotation spot next spring. During the previous season, Priester posted a 13-3 record with a 3.32 ERA in 29 appearances, including 24 starts.