KANSAS CITY -- Royals right-hander Kyle Zimmer, the organization's No. 5 prospect according to MLB Pipeline, recently completed a four-week throwing program as protocol following thoracic outlet syndrome surgery last summer.
Royals assistant general manager J.J. Picollo reported all systems were go for Zimmer, 24.
"He's back home in San Diego and getting ready for his normal offseason with training and conditioning," Picollo told MLB.com. "So everything looks good on that end."
Zimmer, the team's first-round pick (fifth overall) in the 2012 Draft, has battled a variety of arm and shoulder issues since being selected.