Probably because he's an old catcher and Zavala and McGuire actually are doing a fine job so far. The Sox do need a productive LH bat that's for sure. They need the OBP and the power. We're just not sure he can provide those things as quickly as the Sox need them. If say, in his 1st 10 games back he's not providing much hitting but only getting on base via walking that's not much help especially when Zavala has a hot bat and getting less time or going back to the minors may hurt . Seby has provided .7 fWar already in his short time with the Sox in 2022. Does anyone think Grandal can provide that when he comes back in only 71 PA like Zavala has.
We all know Seby is producing way beyond expectations but it does appear something has changed with him.
Adding Grandal only adds basically a part time catcher and one more DH into the fold. Who gets benched with less AB's ,our current hottest bats in Sheets or Zavala? Andrew Vaughn ? Eloy ? Abreu has been amazing for 2 months now. Does he sit and get more rest to allow Vaughn more time ? Do the Sox shorten the bench,negate PR ability, and versatility keeping 3 catchers ? Burger looks like the likely candidate to go down but I sure don't want 3 catchers on the 26 if the options situation means one of them has to be released.