What? This is his fifth season. He was drafted in 2017:
17-18
18-19
19-20
20-21
21-22
And by mileage, I mean he has thrown A LOT of passes and has taken a ton of big shots. He was throwing like 50 times a game at TT and has had a high average number of pass attempts with the Chiefs. It’s physiological that repetitive motions for athletes slowly degrades their body (mostly tendons/ligaments). So, I wouldn’t be surprised if he starts to have nagging elbow/shoulder issues.
But again, like I said, I’d still have a really hard time passing up Mahomes.