Statistically speaking, they aren't much better if at all. Granted, QB rating isn't the end all be all of statistics but: Keenum- has 2 seasons in the last 4 worse than Trubisky's 2019 83 QB rating. Only 1 season in his career better than Trubisky's 2018 95.4 rating. Also, 32 years old with no upside to get better. Mariota- has 1 season better than Trubisky's 2018 95.4, and that was a 95.6 season. Same issues as Mitch with taking sacks. Doesn't throw a lot of picks, but similar gunshy and doesn't process quick enough to anticipate hitting an open receiver. More consistently mediocre though than the rest of this group, Trubisky included. Dalton- was statistically worse than Trubisky in 2019. Only has 1 season with a better QB rating than Mitch's 2018, and that was back in 2015. Older than Keenum so also doesn't have upside to improve. A little INT happy at times. Doesn't have a bunch of arm talent. isn't passer rating up league wide? if it were a good statistic we wouldn't be talking about replacing trubisky. his 2018 wasn't nearly as good as his passer rating makes it out to be. at least, not if you're looking at it from the standards of even 5-10 years ago.