Has sprained ankle
Coach Kevin O'Connell said after Sunday's 3-0 win over the Raiders that Mattison is dealing with a sprained ankle, Ben Goessling of the Star Tribune reports.
Mattison exited in the second half after racking up 66 rushing yards on 10 carries. His return timetable will hinge on the severity and location of the sprain, as low-ankle sprains often take no more than two weeks to come back from, while high-ankle sprains usually result in multi-week absences. Ty Chandler would be in line to handle the majority of snaps in Minnesota's backfield if Mattison misses additional time.
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Cousins, who is recovering from a torn right Achilles' tendon, posted a video Monday which showed him backpedaling and throwing recently in an indoor tennis facility, Kevin Seifert of ESPN.com reports.
Hockenson (knee) underwent successful ACL surgery Monday.
Cousins (Achilles) is ahead of schedule in his recovery from surgery and should resume throwing within the next month or so, Tom Pelissero of NFL Network reports.
Osborn caught two of four targets for nine yards in Sunday's 30-20 loss to the Lions.
Addison caught four of eight targets for 57 yards and a touchdown in Sunday's 30-20 loss to the Lions.
Mattison rushed seven times for 24 yards and caught his lone target for five yards in Sunday's 30-20 loss to the Lions.
Chandler rushed 12 times for 69 yards and brought in two of three targets for 20 yards in the Vikings' 30-20 loss to the Lions on Sunday.
Mullens completed 30 of 44 passes for 396 yards with two touchdowns and two interceptions and rushed twice for eight yards in the Vikings' 30-20 loss to the Lions on Sunday.
Jefferson brought in 12 of 14 targets for 192 yards and a touchdown and rushed once for minus-12 yards in the Vikings' 30-20 loss the Lions on Sunday.
Hall (coach's decision) is inactive for Sunday's matchup against the Lions, but he'll serve as the emergency quarterback, Craig Peters of the Vikings' official site reports.