Washington has been diagnosed with a hamstring injury and will miss "some time," D. Orlando Ledbetter of The Atlanta Journal-Constitution reports.

Washington didn't play in last Friday's preseason opener against the Lions. The 26-year-old appeared in just one regular-season contest last season, logging 11 snaps on special teams.

Chubb (concussion) practiced without a non-contact jersey Tuesday, Jonathan M. Alexander of the Houston Chronicle reports.

This means Chubb has either made it through the concussion protocol or is in the final stage. He hit his head during practice last Tuesday and missed the next few days, but he returned Monday as a limited participant and now seems ready for full participation. With Joe Mixon (foot/ankle) uncertain for the start of the season, Chubb is competing with Dameon Pierce, Dare Ogunbowale and Woody Marks for backfield roles.

Sanders (knee) is participating in practice Tuesday wearing full pads, Todd Archer of ESPN.com reports.

Sanders missed roughly two weeks of practice, plus Dallas' preseason opener against the Rams, due to a left knee bruise, but it looks like he's now back in full. Head coach Brian Schottenheimer expressed optimism Monday that the running back would be able to suit up for exhibition action Saturday versus Baltimore. Javonte Williams remains the early favorite for Dallas' lead backfield role, but Sanders still has time to make his case for opportunities. Rookie Jaydon Blue (heel) is still not practicing Tuesday.

Mattison (neck), who was placed on season-ending IR on Monday, does not have a career-ending injury, David Furones of the South Florida Sun Sentinel reports.

Mattison suffered a neck injury during Sunday's preseason tie against the Bears that required surgery, and it will cause him to miss the entire 2025 season. It's encouraging that the running back may return in 2026, though given that he inked only a one-year deal with Miami this offseason, it's likely that his next opportunity will come with another organization. With Mattison on IR, both second-year pro Jaylen Wright and rookie sixth-rounder Ollie Gordon will benefit from a clearer path to touches behind starter De'Von Achane.

Walker has been alternating days on and off the practice field since returning from a minor foot injury last week, Gregg Bell of The News Tribune reports.

Seahawks coach Mike Macdonald said it's all part of a plan to keep Walker healthy, not a product of any setback that might threaten the running back's Week 1 availability. Lower-body injuries have been a near-constant for the 24-year-old since he entered the NFL, although he played 15 regular-season games in both 2022 and 2023 before slumping to just 11 appearances last season. The combination of Walker's durability concerns and Zach Charbonnet's solid work in his absence has led to discussion this summer about how the backfield workload will be split under new offensive coordinator Klint Kubiak.

Croskey-Merritt suffered a minor shoulder injury during Friday's 48-18 preseason loss to the Patriots, John Keim of ESPN.com reports.

The rookie was held out of Tuesday's scrimmage but is expected back in practice soon. While it's unclear if he'll play in Monday's exhibition contest against Cincinnati, Croskey-Merritt appears to be on track for a Week 1 roster spot. He was the first RB through the rotation in the preseason opener, working ahead of Jeremy McNichols and Chris Rodriguez while Brian Robinson and Austin Ekeler were rested.

Cook is expected to practice Tuesday according to Bills head coach Sean McDermott, Alaina Getzenberg of ESPN.com reports.

Cook is seeking a contract extension and hasn't practiced in about a week as part of a "hold in" strategy. McDermott said Tuesday that "things have changed," leading to Cook's return to practice, and that "the information that we're getting is that he's moving in the right direction," per Katherine Fitzgerald of The Buffalo News. Those comments hint at positive developments in the contract negotiations, though McDermott cautioned that it's too soon to say the running back had ended his hold-in, per Joe Buscaglia of The Athletic. Ray Davis and Ty Johnson have handled the majority of first-team reps during Cook's voluntary absence.

The Dolphins signed Boone to a contract Monday.

With Alexander Mattison (neck) being placed on injured reserve, the Dolphins bolstered their backfield Monday by adding Boone and Aaron Shampklin. Boone appeared in six regular-season games for the Panthers in 2024 and posted 13 carries for 51 yards along with one catch (on three targets) for minus-2 yards. Boone, Shampklin and Ollie Gordon will compete for the RB3 job behind De'Von Achane and Jaylen Wright.

White suffered a foot injury during the Saturday's 30-10 preseason loss to the Jets, Mike Spofford of the Packers' official site reports.

White played seven snaps (two on offense, five on special teams) and turned two carries into 16 yards late in the second quarter of Saturday's game. He appears to have come out of that contest worse for wear, and his practice participation during the coming week will provide clarity on his status for Saturday's exhibition game against the Colts. White signed with the Packers as an undrafted free agent in late April and is competing for a depth spot on Green Bay's 53-man roster.

The Bears signed Brown to a contract Monday.

The move corresponds with Chicago waiving Ameer Speed (undisclosed) with an injury designation. Brown spent most of the 2024 season on the Seahawks' practice squad and hasn't seen regular-season action since 2022 with the Raiders, when he played 61 snaps on special teams across six games. He'll have an opportunity to see snaps out of the backfield during practices and preseason games due to injuries to Roschon Johnson (foot), Travis Homer (calf) and Deion Hankins (concussion).