Tom Brady
There’s not a better quarterback in the league from a resumé standpoint than Brady. Unfortunately for him, resumés don’t win football games. At age 43, it’s hard to imagine he’d be an upgrade over Garoppolo, but other things factor in as well. Brady needs time to develop chemistry with receivers, and the 49ers have a ton of questions at that position. Not to mention his mobility isn’t great, which eliminates some of what the 49ers are able to do on offense. Brady statistically was not better than Garoppolo last season, and it’s hard to believe that’d change in 2020.