Pressure’s on: The 10 Sprint Cup Series drivers with the most to prove in 2015 Tom Jensen @tomjensen100 Oct 20, 2016 at 4:50p ET TONY STEWART Although he enjoyed tremendous success as a team owner and businessman last year, Stewart struggled mightily in the cockpit. Does he still have it? NASCAR via Getty Images David Becker RICKY STENHOUSE JR. This season, Stenhouse needs to pick it up and prove that he's more than just Danica Patrick's boyfriend. NASCAR via Getty Images Sean Gardner CARL EDWARDS Two years ago, Matt Kenseth moved to Joe Gibbs Racing and won seven times. That will be the measuring stick for Edwards in this, his first year with JGR. Getty Images Tom Pennington GREG BIFFLE For the first time in his career, Biffle is the unquestioned No. 1 driver at Roush Fenway Racing. And he's riding a 57-race winless streak. That needs to change soon. NASCAR via Getty Images Chris Graythen DANICA PATRICK Is she a novelty or a true race-car driver? Well, it ought to be clear by the end of 2015. Patrick must raise her game substantially after points finishes of 27th in 2013 and 28th in '14. Getty Images Jonathan Ferrey CLINT BOWYER All of the Toyota teams and drivers struggled last year. Bowyer has to visit Victory Lane again, something he hasn't done since 2012. Getty Images Jerry Markland JIMMIE JOHNSON With six championships under his belt, Johnson doesn't really have anything to prove, except that last year's subpar performance was a fluke. NASCAR via Getty Images David Becker AUSTIN DILLON After a solid but unspectacular rookie campaign, Dillon needs to get the black No. 3 closer to the front this time around. Getty Images for NASCAR Todd Warshaw BRIAN VICKERS No driver has had worse luck with health issues in recent years than Vickers. Once he gets healthy again, he has to stay healthy. Getty Images Tom Pennington DALE EARNHARDT JR. In terms of victories, Earnhardt had his best season in a decade last year. Now he must prove it wasn't a fluke. NASCAR via Getty Images Robert Laberge Next Gallery 14 New faces in new places: Major changes coming in 2015 Start Gallery » FOX Fantasy Auto Form a Racing Team, Compete for Prizes Play Now!