A crowded backfield can quickly diminish a running back's Fantasy value. And before you try and determine which running back will receive the bulk of the carries moving forward, you need to see SportsLine Fantasy analyst Matt Franciscovich's breakdown of some of the most fluid running back committees heading into Week 14. 

Franciscovich, spent four seasons at NFL Network as on-camera talent and as a writer/editor, appearing on NFL Fantasy Live, Fantasy & Friends, and NFL Pick'Em. You might remember him best as one of the 'Fantasy Hipsters,' a segment that was nominated for FSWA "Best Video" award in 2016. He's also a featured contributor of the Fantasy Football Black Book, which has spent ample time at No. 1 in Fantasy books on Amazon in 2018 and 2019. Now, Franciscovich is a Content Strategist at EA Sports, focusing on Madden NFL, while continuing to dish out Fantasy takes for SportsLine. He has years of experience handing out league-winning advice, so if there's anybody who can help you win your league, it's him. 

One thing we can tell you heading into Week 15: Franciscovich expects San Francisco running back Raheem Mostert to continue piling up big numbers. 

"Mostert has been flexing his efficiency on opposing defenses for three straight weeks," Franciscovich said. "In Week 14 he received 12 touches that he converted into 109 scrimmage yards and two touchdowns. He was the only San Francisco RB to play more than 12 snaps in the game, and he's averaged over seven yards per rush over the course of his last three games. 

Franciscovich has also identified a running back who could be in position to be a top-10 option this week, and has made the call on what owners should do with New England's crowded backfield.

So which running backs can you trust in Week 15? And which running back needs to be in your lineup? ... Join SportsLine now to see Matt Franciscovich's analysis, all from one of the top Fantasy football analysts in the nation!