3. Teddy Bridgewater QB2 over Nate Sudfeld
Ok, so this isn't really a training camp battle--yet. But the roster move the Lions have made to emperically make room for Bridgewater, releasing guard Logan Stenberg and not cutting Sudfeld, points to the idea of it being an actual competition to be Jared Goff's backup for a little bit. On that front, it fits the competition template the Lions' coaching staff has always set to keep Sudfeld around a little while longer.
If Bridgewater had been signed in April, when the Lions reportedly made a strong offer, Sudfeld probably wouldn't have made it to OTAs on the roster and he would ostensibly not have been the No. 2 quarterback.
But after a strong showing at OTAS and minicamp, which fostered faith (logical or not) in the Lions' backup quarterback situation as it is/was, Sudfeld has had a rough recent run at training camp. In particular, how he looked last Saturday against the Lions' No. 1 defense seems to have paved the way for finally getting a deal done with Bridgewater.
Unless Sudfeld suddenly turn things around with actual competition for his previously anointed spot, and maybe even if he does perform better moving forward, Bridgewater is the clear-cut favorite to be Goff's primary backup. There's a chance Sudfeld is kept around as the third quarterback on the 53-man roster going into the season. But any veil of competition for the QB2 spot that's presented should not be believed.