Brown sustained a ruptured ACL during Sunday's 27-10 loss against the Giants, Dave Zangaro of NBC Sports Philadelphia reports.
Unsurprisingly, the diagnosis means Brown will be done for the rest of the season, per Mike Garafolo of NFL Network. If Reed Blankenship (groin) is also unable to play in the wild-card round, it could mean a postseason start for Tristin McCollum.