He's done nothing yet.
alm: This is the kid who had 20 TDs and 12 INTs and 4 of the TD's were rushing. He hasn't proven he can read NFL defenses yet or carry a team with his arm. He's a runner first and passer second. He's like Baker, take away his early reads and he doesn't know what to do so he forces the ball or runs. Like Baker, DCs have a book on the kid so let's see how he does now. Don't forget he's playing in the same offensive scheme as he was in college. He should have actually played better.
Actually Murray and Mayfield played about the same last year. Like Murray, of Baker's 21 TD's 3 were running. Both had pretty much the same number of attempts and fairly close to the same yardage passing. Neither one has proved they are legit franchise QB's or can play at this level yet. To once again show you how messed up PFF is they rate Mayfield almost 10 points higher than Murray even though he threw more INTs than passing TDs.
Speaking of Baker, IMO this is a make or break year for him. If he continues to slide I think the Browns will be drafting their next franchise QB in 2021. In his second year Mayfield appeared to regress. Actually, he didn't regress as much as he didn't improve and defenses now know how to beat him by keeping him in the pocket taking away his early reads and forcing him to make a throw. After last year's debacle there are once again question about Mayfield's work ethic. The Browns have a contract out year in 2021. LMAO
Murray needs to show development in being able to read NFL level defenses. I expect teams to play him like they do Baker Mayfield, i.e. to take away his first reads and make him beat you by being patient and reading defenses. Otherwise he will be on the same career trajectory as Mayfield.