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In Sunday's game against the New England Patriots, Miami Dolphins starting running back Arian Foster left the game with a groin injury, leaving Jay Ajayi as the team's top back.

There is no word on whether Foster is expected to miss significant time, but with his history of soft-tissue injuries combined with the fact that he has missed 23 of 48 possible games over the past three seasons means there's a good chance that Ajayi sees extended run as a starter this year.

We haven't seen much of Ajayi at the NFL level -- with only 49 carries and 11 targets in his 9-game rookie year in 2015 -- but he looked to be at least a serviceable rusher, with -0.01 Rushing opportunity is much more important than efficiency for running backs in fantasy football, and Ajayi looks to be in for the lions' share of the work in the Miami backfield, as he out-carried Kenyan Drake five to two while seeing four targets to Drake's two this week.