Offensive Line Will Get Better
If you watched any Browns games last year, you could tell the offensive line was terrible and they need to address it in the draft and free agency.
According to PFF, the Browns dropped from second overall in their offensive line grade in 2018 to 23rd in 2019. If they can just jump to the middle of the pack in 2020, that will help Mayfield the most to be able to throw in a clean pocket and see similar results to his 2018 production.