Adding:
Joey Bart - with Posey sitting out he may get an opportunity a lot sooner than expected.
Dylan Carlson - may get some reps by midseason with a DH in the NL. He's one of my favorites in the minors but the OF in St Louis is looking ok right now
Alec Bohm - worth keeping an eye on...Kingery is currently the projected starter at 3b and he's tested positive for Covid. His defense still needs some work but his bat is ready. He's taking reps at first right now.
The Tigers should be terrible and I doubt they make things interesting...but if they do...Casey Mize is ridiculous.
Edit: Haha...missed the 'AL Only' part of the post. I wondered how so many were left off the first list.
AL Only:
If Jesus Luzardo counts (he had something like 12 innings last year in the majors), he's up there.
Kopech for the CWS is a high risk, high reward after Tommy John.