He was topping out at 97 mph in 2019 and 2020 but now he's barely scraping 95. Luckily the carry on his fastball is elite, so hitters are still late on it. It could be a simple arm slot issue but they're not going to fix what isn't broken. The guy from 19/20 had A+ ace written all over him, the guy now is a solid #2. He always gives up HRs because he lives at the top of the strike zone with the heater, so if said pitch continues to be more hittable, it also makes his change more hittable, and then what happens? I think Giolito is fine for the rest of the Sox team control but I wouldn't bet on him into his 30s as of right now.
I like the guy, he's paid his dues, bet on himself and I hope he gets paid. I understand why the Sox don't want to do it though.