Broncos add Mack

The Broncos are signing RB Marlon Mack off the 49ers' practice squad. Per 9News' Mike Klis, the team hopes to get Mack to Denver in time for this afternoon's flight to London. The move suggests that RB Mike Boone will miss at least Sunday's game vs. Jacksonville with his ankle injury. Don't expect Mack to see much action, though, behind RBs Melvin Gordon and Latavius Murray.