Left-hander Nate Smith, who remains one of the Angels’ top-rated prospects despite missing most of 2017 with injuries, is expected to miss the 2018 season after undergoing shoulder surgery.

Smith actually had the anterior capsule surgery in September, but it had gone unreported publicly. Smith’s agent, Jonathan Maurer, confirmed the surgery on Friday.

Smith underwent a similar procedure as the Dodgers’ Julio Urias, Maurer said. The expected timetable for recovery is 12 to 14 months. Maurer said Smith is in good spirits and optimistic about his recovery, perhaps even beating the odds to make it back sometime in 2018.