Arrieta was only 91-92, his curve was very good, his FB had movement but he struggled with location.
Since he's two weeks behind and working on things, I wouldn't read much into it.
But the loss of velocity last season may be the new reality for him.
Thompson wasn't throwing as hard as his last couple outings, wonder if coming out of the pen makes it hard for him to get loose, some guys are just better suiting to starting. We'll see.