Kansas City Royals right-hander Nate Karns will undergo season-ending surgery next week to remove a rib that's causing nerve pain in his forearm, the team announced Saturday.
The thoracic outlet surgery will be performed by Dr. Gregory Pearl on Wednesday in Dallas, according to a report by MLB.com. Thoracic outlet syndrome is caused by compression of nerves, arteries or veins in the area between the lower neck and armpit area.