Minnesota Vikings outside linebacker DJ Wonnum has a partial tear and will likely need surgery, a source confirmed to ESPN on Monday.
The source said Bonnom's hip flexor remained intact, and he is seeking a second opinion.
The Vikings are also bracing for bad news with tight end TJ Hockenson, sources told ESPN's Jeremy Fowler, who will undergo an MRI on Monday on his right knee.
Wonnum left Sunday's 30-24 loss to the Detroit Lions after suffering a left leg injury while trying to rush the passer in the fourth quarter.
The 26-year-old veteran is having his best season since the Vikings drafted him in the fourth round in 2020, recording a career-high in tackles (62) in 15 games (14 starts). His eight sacks tied his career high. He returned a fumble 51 yards for a touchdown in a Week 4 win at Carolina.
Wonnum recorded 23 sacks, 49 quarterback hits, 11 passes defensed and 171 tackles in 62 games (31 starts).
The Vikings (7-8) may have to rely on Pat Jones II and perhaps rookie Andre Carter II for their remaining two games against the visiting Green Bay Packers (Sunday) and the host Detroit Lions (Jan. 7).
Hockenson took a helmet knee on the Vikings' first drive of the second half on Sunday and did not return.
Hockenson, 26, leads Minnesota with 95 catches and 960 yards and has five touchdowns in 15 games (11 starts) this season.
NFL Network first reported the nature of Sleep's injury.
Field-level media contributed to this report.
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