2:04pm: A brutal stretch for the Lions will impact the team’s backfield. Dan Campbell announced Monday afternoon Montgomery is set to undergo season-ending knee surgery. This will certainly change how Detroit proceeds on offense, as Montgomery and Gibbs have formed a lethal tandem since being paired together in 2023.
Montgomery’s extension secured $2MM guaranteed as part of his $5.49MM base salary next season; he is signed through 2027 as part of the deal. The Lions have veteran Craig Reynolds and fourth-round rookie Sione Vaki in place as backups behind Gibbs.
11:30am: The notable losses suffered on defense
are not the only blows the Lions were dealt yesterday. Running back David Montgomery
is dealing with an MCL injury and is out indefinitely, ESPN’s Adam Schefter reports
. 
Schefter adds Montgomery is set to undergo further testing on the injury; he will also seek out a second opinion on the matter. If he is to miss significant time (which Schefter notes is a distinct possibility), Detroit’s rushing attack will be greatly affected. Ian Rapoport of NFL Network reports the injury is in fact an MCL tear.
As a result, it remains to be seen if Montgomery will be available again in 2024. Losing him for the rest of the year would deal a major blow to Detroit’s rushing attack given the effective tandem he has formed with Jahmyr Gibbs over the past two years. The Lions rank sixth in the NFL in rushing yards per game in no small part due to Montgomery’s success.
The former Bear eclipsed 1,000 yards for the second time in his career in 2023, averaging a career-high 4.6 yards per attempt along the way. Montgomery’s efficiency has seen a slight decline this year, and an increased workload for Gibbs has lowered his per-game rushing output. Still, the Montgomery-Gibbs pairing has remained a focal point of the Lions’ elite offense, and losing one of the league’s top short yardage and goal line backs could be crippling down the stretch. Detroit remains in contention for the NFC’s No. 1 seed , but overcoming a long list of injuries will be needed to secure the first-round bye.
Montgomery landed a two-year extension in October in a move which ensured he would remain in the Motor City through Gibbs’ rookie contract. Expectations remained high in the wake of that raise, and that will still be the case whenever the 27-year-old is next on the field. If testing indicates Montgomery will not be available again in 2024, however, Gibbs will face a notably increased workload while Detroit’s passing game will be leaned on to compensate.
The defensive side of the ball has been hit much harder than the offensive side in the case of the 2024 Lions. Quarterback Jared Goff , along with Gibbs, wideouts Amon-Ra St. Brown and Jameson Williams and tight end Sam LaPorta – not to mention all five of the team’s O-line starters – are healthy at this point. Montgomery’s absence would nevertheless be acutely felt if he is in fact unable to return.