Orioles closer Zach Britton ruptured an Achilles tendon while working out in California Dec. 19. The left-hander, who missed considerable time in 2017 due to forearm and knee injuries, was working out at a facility operated by his agent, Scott Boras.
Britton will have surgery Dec. 21. The injury is expected to sideline him for at least six months.
The Britton news was first reported by Ken Rosenthal and confirmed by multiple industry sources.
Britton, who converted all 47 of his save opportunities in 2016, suffered a forearm injury this past April that led to two stints on the disabled list. He missed most of the season's first half, and in September his season ended early due to left knee soreness.