Spencer Rattler named starting QB ; Jay Glazer reports Rattler expected to start next 3-4 games (month) until Carr’s return

This is simply not true.

Haener is not an overly accurate QB for someone whose arm strength isn’t great. If you’re going to be undersized at that position (Haener is barely 200 pounds), you better have some incredible gift that overcomes it. Rattler has that kind of arm talent. Haener does not.

Rattler has also shown a better ability to navigate a pocket when he’s under pressure, and get out and make big plays on the move.
1st I've seen the weight difference between JH and SR from 6-10 lbs , hardly a difference, and JH is an inch taller. JH has better anticipation. and foot work. Maybe you should go and re-watch last yr's Charger pre season game