The 49ers signed Vaughn to a contract Saturday.

Vaughn will solidify the 49ers' backfield depth due to Isaac Guerendo (shoulder) and Jordan James (finger) both being sidelined for a few weeks. Vaughn spent most of the 2024 season on the 49ers' practice squad and played in three regular-season games, logging two carries for four yards.

Vaki (leg) did not play in Friday's preseason game against the Falcons, Christian Booher of SI.com reports.

Vaki injured his leg near the start of training camp, and while he's been able to practice in a limited capacity, he was not cleared to play in Friday's contest. The former fourth-rounder is battling Craig Reynolds and Jabari Small for the RB3 job behind Jahmyr Gibbs and David Montgomery. Vaki will look to increase his practice participation over the coming week in order to be given the green light to play against the Dolphins on Saturday, Aug. 16.

Chubb (head) is not in line to play in Saturday's preseason opener against the Vikings, Aaron Wilson of KPRC 2 Houston reports.

Chubb missed a couple of practices after taking a hard hit to the head Tuesday, but he may have been rested anyway Saturday, with the Texans holding a number of other key players out. Also not in line to see action against Minnesota are QB C.J. Stroud, RB Dameon Pierce and TE Dalton Schultz.

Jones is not in line to play in Saturday's preseason opener against the Texans.

The same applies to star WR Justin Jefferson, who has been dealing with a hamstring issue. As far as Jones is concerned, there's no reported injury in play, so it appears as though the Vikings are simply playing it safe with their top back, a scenario that will give the team's reserve backfield options added opportunities Saturday.

Major (concussion) participated in Saturday's training camp practice while wearing a non-contact red jersey, Jeff Zrebiec of The Athletic reports.

Major remains in concussion protocol, which forced him to miss Thursday's preseason game against the Colts. His return to practice is a good sign, but he'll need to clear the league's five-step protocol in order to play in the Ravens' next preseason game against the Cowboys on Saturday, Aug. 16. Major signed with the Ravens as an undrafted free agent in late April and is battling for a backup running back spot on the 53-man roster.

Mitchell (undisclosed) is not participating in Saturday's training camp practice, Jeff Zrebiec of The Athletic reports.

It could just be a maintenance day for Mitchell, who got an extended run during the Ravens' preseason game against the Colts on Thursday and finished with 68 rushing yards and a touchdown on nine carries. His practice participation over the coming week will be worth monitoring as the Ravens prepare for their next exhibition game against the Cowboys on Saturday, Aug. 16.

Cook participated in warmups ahead of Saturday's preseason opener against the Giants, Alaina Getzenberg of ESPN.com reports.

While it's unclear if the running back will see any action in the contest, the fact the Cook is in uniform Saturday after having been sitting out practice of late is worth noting. Cook, who is entering the final year of his rookie contract with the Bills, is seeking an extension with the team.

Johnson (hamstring) will be sidelined for Saturday's training camp practice, Dave Zangaro of NBC Sports Philadelphia reports.

Johnson is working through a hamstring injury, which forced him to observe Thursday's preseason opener against the Bengals from the sidelines. He signed with the Eagles as an undrafted free agent in late April, so an extended absence hurts his chances of making the 53-man roster at the end of training camp. Johnson will focus on getting back on the practice field and being available for the Eagles' second preseason game against the Browns on Saturday, Aug. 16.

Mafah indicated Friday that he played through a torn labrum in his shoulder during his final college season at Clemson, Joseph Hoyt of the Dallas Morning News reports.

The injury may have contributed to Mafah lasting until the seventh round of the 2025 NFL Draft, but he's looked good in padded practices since training camp began, using his physicality and vision to produce some chunk plays. He's in line to see a big workload during Saturday's preseason opener against the Rams due to starter Javonte Williams likely being held out and both Miles Sanders (knee) and 2025 fifth-round pick Jaydon Blue (heel) nursing injuries. A big performance from Mafah could create a very interesting battle in the Cowboys backfield between the two veterans and the two rookies ahead of Week 1.

Etienne gained three rushing yards on two carries, caught his only target for 14 yards, and added 27 yards on two kick returns in Friday's 30-10 preseason loss to the Browns.

The 2025 fourth-round pick was the third running back into the game for the Panthers after Chuba Hubbard and Rico Dowdle, and while Etienne's varied usage was encouraging, he also muffed a punt deep in Carolina territory at the end of the first quarter that led directly to the Browns' first TD of the game. Raheem Blackshear, Etienne's primary competition for the No. 3 spot on the RB depth chart, handled kick- and punt-return duties for Carolina in 2024 and gained a career-high 936 yards in that role, so the rookie's miscue could weigh heavily on his prospects. Given the draft capital expended on him, Etienne's spot on the 53-man roster is likely secure, but he's got a tough road to carving out any kind of fantasy value.