Castillo has been slowed by shoulder soreness this spring and may miss the start of the season, C. Trent Rosecrans of The Athletic reports.

EDGE Analysis

Castillo's arrival at camp was delayed slightly by a family issue, and the shoulder troubles pushed back his throwing progression even further. He's advanced to long toss and appears to be trending in the right direction, but it's likely he misses at least a start or two at the beginning of the regular season.