The Detroit Lions' "two-headed monster" backfield has simply not been unleashed so far this season. David Montgomery has missed three games, and Jahmyr Gibbs has missed two. Early in the season, as Gibbs was getting acclimated, Montgomery got huge workloads.
Montgomery missed the two games going into the Lions' Week 9 bye, and Gibbs stepped up big time. The time when the workload split would move toward the rookie is here, and Montgomery is set to return this week against the Los Angeles Chargers.
Fantasy managers with Montgomery will surely put him right back into their lineups this week. Those with Gibbs are probably still starting him this week without question, but the downside potential is hard to ignore. There is an argument, for those who can consider it, to avoid the Lions' backfield entirely in Week 10 until we see how the workload is doled out.
David Montgomery and Jahmyr Gibbs are both unquestioned fantasy starters in Week 10 vs. Chargers
The Chargers are sixth in the league against the run this season (89.8 yards allowed per game), and in terms of fantasy points allowed to running backs they are a middle of the road matchup. They are also toward the bottom of the league in rush attempts against (20.1 per game to running backs), which correlates with them being the league's worst pass defense (286 yards per game).
But six running backs have scored at least 13 full PPR points against the Chargers this season, and that production has come mixed via the ground or the air in those cases. Four have topped 80 yards or scored on the ground, and four have had at least five receptions or had a receiving touchdown against them (Alexander Mattison and Josh Jacobs did both things).
Both healthy and with a more equal share of the work coming, Montgomery or Gibbs aren't lined up to finish as a fantasy RB1. But they are both solid RB2 options against the Chargers in Week 10, and Gibbs gets an ancillary boost in PPR formats. With a flex spot in mind, both should be started without question for most (if not all) of their fantasy managers.