ESPN Fantasy Projection: Mostert signed with the Dolphins and the 30-year-old will compete to open the season as the team's lead rusher. Believe it or not, Mostert's career 5.7 YPC is tops in NFL history among all backs with 200-plus carries. Of course, he only has 284 career attempts due primarily to horrific injury luck. Mostert has played more than 11 games in a season once in his career (2019) and missed all but four snaps last season due to an injury. He could handle upward of half the carries and the occasional target (he's never cleared 22 in a single season), with Chase Edmonds and perhaps Myles Gaskin also involved in the offense. Mostert is likely to max out as a flex option and is a poor bet to hold up for the entire season.