49ers linebacker Dre Greenlaw has known for a while that he faces long odds of returning from injury in time for Week 1 of the 2024 NFL season. After suffering a torn Achilles tendon in the Super Bowl, Greenlaw has been working his way back to the field slowly. As the regular season approaches, though, it’s becoming more and more clear that San Francisco will need to look elsewhere to start the year. 
According to Matt Barrows of The Athletic, the 49ers have been operating under the assumption that they’ll be starting the year without Greenlaw since they entered the offseason. Initially, the team made moves to acquire Eric Kendricks, planning to utilize him in that weakside linebacker role as Greenlaw continued to recover. Kendricks opted instead to sign with the Cowboys, changing his mind after coming to an agreement with San Francisco.
With Kendricks out, the Niners signed recent Packers linebacker De’Vondre Campbell. Campbell has spent most of his career as one of two inside linebackers in 3-4 defensive fronts, so he’ll face a slight adjustment in San Francisco’s base 4-3 scheme. The consensus after the spring is that Campbell will start off the year in Greenlaw’s weakside linebacker position until Greenlaw is able to come off of the injured list (likely the physically unable to perform list), then Campbell will transition to the strongside role.
To fill that strongside role until Campbell comes over, San Francisco has several options. There are three veterans — Zeke Turner, Demetrius Flannigan-Fowles, and Curtis Robinson — on the roster, but all three have established themselves as special teamers over the past few years, though Turner and Flannigan-Fowles do have a few starts under their belt. Three young, late-round draft picks make up the rest of the room. Last year’s seventh-round pick Jalen Graham saw extremely reserved time last season, while this year’s seventh-round rookie Tatum Bethune may not be asked to step into that big of a role this quickly.
Last year’s sixth-round pick out of TCU, Dee Winters, though, has been tabbed by starting middle linebacker Fred Warner as a player to watch. Though Winters played in 15 games last season, he played sparingly on the defense. This spring, though, Warner called out Winters as having “the best (organized team activities) out of anybody on the team.”
If Winters continues to be a strong contributor throughout training camp, he may end up getting elevated from special teamer to starter to open the year. Winters may be able to provide the 49ers with the temporary bandage they need to cover for the absence of Greenlaw until he returns from a probable PUP stint. If not, they may need to explore more veteran options on the free agent market or rely upon a veteran of their own.