The offseason is not over, and it's likely a pitcher will be moved.
But here is your non 1-5 starting rotation Kyle Harrison/Patrick Sandoval/Kutter Crawford/Connelly Early/Payton Tolle.
Kyle Harrison (former top 25 prospect, still just 24 years old, characteristics Sox love)
Patrick Sandoval (put up 6 War in 2022-2023, 29 years old Sox saw something in him)
Kutter Crawford (still just 29, not an all star but we've seen MLB rotation potential in him)
Connelly Early 23 year old with perhaps a little more development left, showed potential in 2025
Payton Tolle 23 year old, perhaps still cooking, top Sox prospect, current top 100.
Honorable mention, are close prospects like David Sandlin, & Jake Bennett
currently sox have the #1 projected WAR in the big leagues on the pitching side, lets' not talk about the offense.