The 49ers signed Abdullah to a one-year contract Thursday, Jennifer Lee Chan of NBC Sports Bay Area reports.

Abdullah had a tryout with the Niners on Wednesday and things evidently went well for the veteran running back. He turned 32 years old last month and appeared in 16 regular-season games for the Raiders last season, logging a 66-311-2 rushing line in addition to a 40-261-3 receiving tally on 47 targets. Abdullah will look to win a job behind Christian McCaffrey, Isaac Guerendo and rookie Jordan James this summer.

The Bucs waived Williams (undisclosed) on Thursday.

The Bucs swapped out Williams for Owen Wright in the backfield. Williams, who was waived with an injury designation, per Greg Auman of Fox Sports, appeared in one regular-season game for Tampa Bay last season, returning a pair of kickoffs for 54 yards. He didn't see any snaps on offense.

Allen (knee) remained sidelined during practice Thursday, Susanna Weir and Eric Allen of the Jets' official site report.

Allen now has missed two straight practice with knee soreness. However, prior to that, Zack Rosenblatt of The Athletic relayed that the 2024 fourth-rounder had been having a strong training camp, noting that Allen -- who officially is listed at 6-foot-1, 235 pounds -- "looks bigger, faster and stronger" than he did as a rookie, when he logged 92 carries in 17 regular-season games while working behind lead back Breece Hall (209 carries).

Sanders (knee) is not practicing Thursday due to what has been labeled a slight knee bruise, Todd Archer of ESPN.com reports.

Sanders' injury is to his left knee, Joe Hoyt of The Dallas Morning News reports, and he's wearing a compression sleeve on that leg Thursday. There are no indications that Sanders is dealing with a significant injury, but the Cowboys figure to take a cautious approach to the 28-year-old's recovery. Jon Machota of The Athletic reports that Sanders has been an early standout at training camp, both as a runner and in the receiving game. He's competing for backfield opportunities with Javonte Williams and rookie fifth-round pick Jaydon Blue.

San Francisco head coach Kyle Shanahan said Thursday that James is not practicing due to "knee issues," Eric Branch of the San Francisco Chronicle reports.

James has reportedly enjoyed a strong start to training camp, with Vic Tafur and Matt Barrows of The Athletic reporting that the rookie fifth-round pick has impressed both Shanahan and offensive coordinator Klay Kubiak. Health provided, James appears in solid position to secure the No. 3 backfield role behind All-Pro starter Christian McCaffrey and backup Isaac Guerendo, but the severity of his current knee issue remains undisclosed. Per Noah Furtado of the San Francisco Chronicle, Shanahan said James will be re-evaluated periodically throughout the next week.

In an interview with Mike Garafolo of NFL Network and Ian Rapoport of NFL Network on Thursday, Stevenson indicated that he's lost 10-11 pounds since last season.

As he heads into his fifth campaign as a pro, Stevenson is set to continue his key role in a New England backfield that also includes 2025 second-rounder TreVeyon Henderson, along with fellow returnee Antonio Gibson. While Stevenson is on track to log his share of backfield touches out of the gate this season, Henderson no doubt will earn a solid portion of the work as well, with Gibson mixing in. For his part, Stevenson noted that he aimed to slim down this offseason with an eye toward staying fit for the long haul while unlocking more breakaway speed, which is something that Henderson has plenty of himself. From a fantasy standpoint, Henderson is the upside play, which is reflected in his current ADP, but with the Patriots' passing game a work in progress, Stevenson's role in the ground game, even while working in tandem with Henderson, should be steady enough to keep him on the weekly lineup radar.

Davis has gotten additional reps in practice in the absence of Braelon Allen (knee), Nick Wojton of USA Today Jets Wire reports.

Allen sat out Tuesday due to knee soreness, paving the way for Davis to get more opportunities alongside lead back Breece Hall. Davis, Allen and Hall all appear to be locks to make the regular-season roster, with the Jets set to use the same backfield personnel while employing a new offensive scheme under a new coaching staff. After being selected in the fifth round of the 2024 NFL Draft out of South Dakota State, Davis had 30 carries for 174 yards and a touchdown, as well as nine catches for 75 yards and a touchdown on 12 targets, in his rookie campaign with the Jets.

Tuten (hamstring) returned to the practice field Thursday, Mia O'Brien of 1010 XL 92.5 FM Jacksonville reports.

As expected, Tuten's hamstring issue wasn't a long-term concern, though O'Brien notes that the 2025 fourth-rounder was limited during team drills Thursday. Once Tuten is able to work fully, he'll continue to push for a role in the Jaguars backfield, but so far in training camp Travis Etienne and Tank Bigsby have handled the bulk of the reps with the team's top offense, per John Shipley of SI.com.

Etienne and Tank Bigsby have handled the bulk of the reps alongside starting QB Trevor Lawrence in training camp, relative to the rest of the Jaguars' running back corps, John Shipley of SI.com reports.

In the process, Shipley suggests that the team's backfield roles are starting to be defined, with Bigsby setting the tone as an effective downhill rusher, while Etienne has been the best and most-used back in the passing game. Down the road, 2025 draftees Bhayshul Tuten and LeQuint Allen could push for playing time, but thus far, the sort of Bigsby/Etienne timeshare that was in play last season has continued during the Jaguars' ongoing training camp.

White said during Thursday's training camp practice that he's dropped down to roughly 212 pounds and has improved his quickness, conditioning and stamina heading into Year 4, Greg Auman of Fox Sports reports.

White enters 2025 seemingly positioned for a complementary backfield role that will primarily make use of his passing-down skills, while 2024 breakout Bucky Irving dominates carries. As a pure runner, White has at times looked indecisive between the tackles, though last year was actually the most efficient of his career on the ground, with 144 carries for 613 yards (4.3 YPC) and three scores across 16 regular-season appearances. The 2022 third-round pick has only missed one regular-season game in his career to date, and he'd likely inherit a huge role if the 195-pound Irving were to miss any time, though there's also a lingering possibility that Sean Tucker (who averaged 6.2 YPC on just 50 rushes last year) pushes for more touches.