Like some have stated in previous posts Haener is more like Carr he can run the Carr plays better than Rattler can. Just like when Drew got hurt a few years back Winston came in or would come in if Drew got hurt on game day but Hill was going to be the starter if and when Drew missed the game. The Titans did the same thing last year. Willis was the backup and Levis was QB3. They went to Levis the next week after Tannehill got injured.