So, I looked up Mora's QB history.
Mora was at UCLA from 2012 to 2017. His first 3 years, his QB was Brett Hundley who ended up being drafted in Rd. 5. His QB for the next 3 years was Josh Rosen who was the 10th player picked in the NFL draft. Rosen was replaced in 2016 due to a shoulder injury midway through the season.
In his 3 year stint at Atlanta, his QB was Michael Vick and he was never replaced as the starter. For his one year at Seattle, his QB was Matt Hasselbeck who had a mediocre season, but there was nobody better on the roster.
Mora has had really good QBs in his past, so he never had to make a decision on his QB starter based on their play.
