Quarterbacks with the best chance to break out in 2018

It took only five starts in San Francisco for Jimmy Garoppolo to become the team's star. Robin Alam/Icon Sportswire

We all saw what Jimmy Garoppolo did in 2017 after the midseason trade from New England to San Francisco. Five straight wins to close out the year. A league-leading QBR of 79.9 from Weeks 13 to 17. And 82.78 total fantasy points, good for QB8 during that stretch. But the sample size is still small on Jimmy G., and he can be even better in 2018.

Here's where I think Garoppolo and three other young quarterbacks can take the next step for fantasy managers based on their projected floors, ceilings, breakout potential and more.