He had one more than Dylan Raiola of Nebraska. One more than Nussmeier at LSU, two more than Jalen Milroe and Quinn Ewers.
The gap between Retzlaff and other major starters isn't as huge as you're making it out to be, in terms of interceptions.
So to get down to the level of Ewers and Milroe, then, he only has to have two fewer interceptions next year.
Are two interceptions worth replacing an improving QB going into he senior year?