Lions defensive tackle Haloti Ngata is expected to miss 2-3 weeks, according to Ian Rapoport of NFL.com (on Twitter). He is currently undergoing tests to confirm that timetable. 
Ngata left the Lions’ 24-23 win over the Eagles with a shoulder injury. So far in this young season, the advanced metrics haven’t been fond of Ngata’s play. He ranks as the 58th best interior defender in the league out of 111 qualified players, according to Pro Football Focus. His pass rush score of 69.6 would put him in at least the middle of the pack, but he has earned an atrocious 48.7 mark for his run defense.
In his first season in the Motor City, Ngata started 15 games, posting 15 tackles and 2.5 sacks. This spring, the Lions re-upped him on a two-year pact worth $12MM with $6MM fully guaranteed.
The Lions rank 21st in the NFL in run defense this season.