Fantasy football Week 15 reactions: 49ers, Lions, Bucs & Rams rock, James Cook hot, Cowboys cold

Sporting News' Vinnie Iyer and NFL.com's Michelle Magdziuk examine the fantasy football fallout from Week 15's Saturday and Sunday NFL action, including big performances by Brock Purdy, Christian McCaffrey, Jared Goff, Sam LaPorta, Baker Mayfield, Cooper Kupp and of course, James Cook. Also what happened to Dak Prescott and the Cowboys in Buffalo and why did the Falcons go back to sucking in Carolina? Here's breaking down the action and also providing early injury updates for Week 16.

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