What if every starting running back in the NFL were injured? That’s the exercise we’ll run here, ranking the remaining fantasy backs based on upside should they become their team’s RB1. Running backs have stayed healthier than wide receivers over the past two seasons, but history suggests that will regress in 2026.Tier One1) TreVeyon Henderson, NEThis one feels obvious given Henderson has a higher ADP than Rhamondre Stevenson, who enters the season as New England’s starting back. Stevenson was the better player last year (including fantasy production) and is trusted far more in pass protection — Henderson saw just four snaps in the AFC Championship game. However, Henderson was the RB7 in producing spike weeks as a rookie, when he also ranked 10th in yards per touch (5.3). It’s also likely he improves during his second year in the league. New England’s schedule will be much harder in 2026, but the addition of A.J. Brown will be a big help to the offense.Henderson has massive fantasy upside should he get starter touches.2) Blake Corum, LARCorum could earn closer to a 50/50 split this season, but Kyren Williams is still the Rams’ RB1. Corum will have standalone value (especially in Best Ball leagues), but his true fantasy potential would require an injury to Williams. If Corum took over as LA’s lead back, he’d be locked in as a top-10 fantasy RB in an offense projected to lead the NFL in scoring. The Rams’ difficult schedule during the championship weeks (@Sea, @TB) is a minor concern, although plenty can change (including a Vita Vea trade).3) Tank Bigsby, PHI