Baker’s been the same QB in Tampa as he has been his entire career - super streaky, very inconsistent with high highs and low lows, and is generally bad against good teams.
There’s nothing wrong with Mayfield as a QB in the league. Hell, Mayfield will almost definitely have a long career as a spot starter and a guy to hold down the fort for a year or two - like Ryan Fitzpatrick. But a team’s ceiling is limited by his inconsistency because he absolutely will throw a team out of a game.
Dude’s just irrelevant as hell now.