Cristobal Castillo usually misses the start of the season.
2028 - March 17 - injured thumb, out 4-5 weeks
2029 - March 3 - injured hammy, out 3-4 weeks
2030 - March 6 - concussion, out 8-9 weeks
2031 - April 13 - injured elbow, out 5-6 weeks
2032 - March 30 - injured oblique, out 3 weeks
2033 - March 22 - injured shoulder, out 5-6 weeks
I don't know what it is, but this gets hurt when the season is young. He's fine later on, though....
Career March/April/May injuries: 11
Career June through February injuries: 4