Crawford's initial outlook prior to '23 was backend/bulk. With the missed time and bad results of '24, seems like a reasonable outcome, no?
SP had him as: Summation: Projects as middle reliever. Ceiling of a high-quality swingman, capable of pitching in short or long relief outings with the occasional spot start as well.
Casas is a little bit of a different story. His problem is strictly the injury he's coming off of. If it was a different injury, I may be more optimistic. This one is very likely a career ender. Also, a lot of the word choice the Sox are using in regards to his recovery timeline is interesting. For Mayer and Anthony it's "progressing normally/well." For Casas it's "recovery has been complicated due to the nature of his injury, but hasn't had any setbacks." That's a very interesting way to talk about his injury considering how serious I believe this injury to be.