Week 15 has been a crazy one in the NFL, and the running back position has been as affected as any. It hasn't all been bad, as Chase Edmonds (ankle) and Michael Carter (ankle) are expected to come off the IR, but with guys like James Conner, Jamaal Williams, Javonte Williams, Melvin Gordon, and Tony Pollard questionable for Sunday's games because injury/COVID concerns, making key start 'em, sit 'em decisions won't be easy. That's why we'll be here with the latest updates throughout the day to help you advance in the fantasy football playoffs.For all the latest fantasy news, follow us on Twitter .WEEK 15 FANTASY: | | UPDATE:ESPN's Adam Schefter reported late Saturday night that Conner is against Detroit.UPDATE 2:Conner is officially ACTIVE.Conner (ankle) mi sed practice on Wednesday and Thursday, but after getting in a limited se sion on Friday, coach Kliff Kingsbury said he "" Conner to suit up against the Lions.With Chase Edmonds (ankle) coming back this week, Conner would see fewer snaps regardle s of how he's feeling. That slightly cuts into his ceiling, but with one of the top RB matchups in fantasy, Conner is still a must-start. If he has a setback and is a surprise scratch, Edmonds would be a borderline RB1 in PPR and a solid RB2 in standard.WEEK 15 SUNDAY UPDATES: | | UPDATE:Williams isofficially OUT.Williams was placed on the reserve/COVID list last Friday, and there have been virtually no updates on his status since. It's tough to know whether he still has a chance to be cleared in time to play against Arizona, but considering he wasn't one of the players Detroit activated off the reserve/COVID list on Saturday afternoon, it seems unlikely he'll be available.Williams would be a solid volume-based starting option if active, but if he's out, a combination of Craig Reynolds, Godwin Igwebuike, and Jermar Jefferson would split Jaylen Mahoney Jersey touches in the backfield. Reynolds would likely lead the way like last week, but noneare particularly good or reliable plays in this matchup.WEEK 15 MONDAY/TUESDAY UPDATES: | | | UPDATE:ESPN's Adam Schefter reported late Saturday night that Williams is against Cincinnati.UPDATE 2:Williams is officially ACTIVE.Williams got in a limited practice on Friday after mi sing practice on Thursday, and coach Vic Fangio has already said Williams will play without any limitations against the Bengals.As long as Williams is out there, he's worth at least a flex spot in fantasy lineups. This matchup is much more difficult than last week's, and with Melvin Gordon (hand) also expected to play, RB touches will once again be split. Still, Williams has shown his immense upside in recent weeks, and he's tough to sit given his current hot streak.WEEK 15 STANDARD RANKINGS: | | | | | UPDATE:ESPN's Adam Schefter reported late Saturday night that Gordon is against Cincinnati.UPDATE 2:Gordon is officially ACTIVE.Gordon (hand) was all week, but there doesn't seem to be any real worry about his availability against Cincinnati.Gordon is coming off 111-yard, two-TD game, but this matchup is much more difficult. When you factor in the injury and rookie Javonte Williams' emergence, Gordonis a little bit of a worry given the injury, but he's still a solid flex as long as he's active.WEEK 15 PPR RANKINGS: | | | | | UPDATE:ESPN's Adam Schefter reported late Saturday night that Pollard is but likely to see fewer snaps than usual.UPDATE 2:Pollard is officially ACTIVE.Pollard (foot) managed to on Thursday and Friday and figures to be a true game-time decision for Sunday's game against the Giants.Even if Pollard is active, he might see fewer touches than usual. His big-play potential is still present, especially in a favorable matchup, but he's much more of a "boom-or-bust" flex than a relatively high-floor option. If he's out, Corey Clement will serve as the change-of-pace back for Ezekiel Elliott, but he's not worth a starting spot in all but the deepest leagues. Richard Sherman Jersey