They pulled him because in game 1 he got a little concussed and in this last game he tried to intentionally down the ball to prevent a massive sack and instead fumbled.
IMO they need to replace their offensive linemen before swapping QBs. Swapping QBs is a knee jerk reaction that doesn’t solve the problem of a *edited* poor offense that allows more sacks than my 0-14 high school team.