The Buccaneers signed McClellan to a contract Monday, Adam Schefter of ESPN reports.

The 2024 sixth-rounder played in just two regular-season games with the Falcons during his rookie campaign and ended the year on injured reserve due to a knee injury. McClellan was waived by Atlanta in June, but he will get an opportunity to make an NFL roster with the Buccaneers. He'll have a shot at seeing some backup reps out of the backfield due to Rachaad White (groin) being sidelined.

The Dolphins signed Shampklin on Monday, Mike Garafolo of NFL Network reports.

Shampklin made three regular-season appearances with Pittsburgh in 2024, recording six carries for 17 yards over 27 offensive snaps. After getting waived by the Steelers back in May, Shampklin worked out with a few different teams before finally finding a fit with Miami. The placement of Alexander Mattison (neck) on injured reserve Monday left the Dolphins without any proven options at tailback behind De'Von Achane, leading to Shampklin's signing.

The 49ers placed Abdullah (ribs) on injured reserve Monday.

Abdullah joined the 49ers in late July due to multiple injuries to the team's backfield, but the 2015 second-rounder suffered a rib injury of his own during San Francisco's 30-9 preseason loss to Denver on Saturday. By being placed on IR, Abdullah will be forced to miss the entire 2025 season unless he reaches an injury settlement with the 49ers. Jeff Wilson was signed by the 49ers to a one-year contract in a corresponding move.

Mitchell (undisclosed) did not participate in Monday's training camp practice, Brian Wacker of The Baltimore Sun reports.

Mitchell hasn't practiced since the Ravens' preseason win over the Colts on Thursday, when he rushed for 68 yards and a touchdown on nine carries. The nature and severity of Mitchell's injury isn't clear, but he would be in jeopardy of missing Saturday's exhibition contest against the Cowboys were he not to return to practice. With Mitchell, Rasheen Ali (undisclosed) and Marcus Major (concussion) all sidelined, D'Ernest Johnson and Myles Gaskin will compete for RB3 reps behind Derrick Henry and Justice Hill.

The Dolphins placed Mattison (neck) on injured reserve Monday.

Mattison emerged from Sunday's preseason tie with the Bears with neck soreness and then reportedly underwent neck surgery not longer afterward, per Adam Schefter of ESPN. With Mattison's move to IR, the severity of the injury more or less has been confirmed, and he'll miss the 2025 season, barring getting cut with an injury settlement. Both Jaylen Wright and rookie Ollie Gordon now both have clearer paths to locked-in reserve roles behind Miami's top RB De'Von Achane.

Strong (undisclosed) participated in Monday's training camp practice in a limited capacity, Kelsey Russo of the Browns' official site reports.

Strong did not play in Friday's preseason game against the Panthers due to an undisclosed injury. The 2022 fourth-rounder is in a battle against Trayveon Williams and rookie fourth-rounder Dylan Sampson for a spot on the Browns' 53-man roster as a depth running back. Strong should be available for Saturday's preseason game against the Eagles if he can increase his practice activity over the coming week.

Williams (hamstring) participated in Monday's training camp practice, Greg Auman of Fox Sports reports.

Williams has been sidelined for much of the last two weeks due to a hamstring strain, which caused him to miss Saturday's preseason game against the Titans. He's recovered enough to return to practice, and the undrafted rookie will resume his battle against Sean Tucker and Owen Wright for the RB3 job behind Bucky Irving and Rachaad White (groin).

Chandler had five carries for five yards along with three receptions for 20 yards in Saturday's preseason win over Baltimore. However, he may have fallen behind Zavier Scott in the competition for the No. 3 RB role, the St. Paul Pioneer Press reports.

Scott had an impressive performance with seven carries for 40 yards. However, Chandler did work with the first-team offense while Scott had most of his production in the second quarter. Chandler also was one of the two primary kick returners, which could give him an edge. Still, this battle may not be decided until late in camp, and the loser may not stay on the 53-man roster.

Scott had seven carries for 40 yards and one reception for 11 yards in Saturday's preseason win over Baltimore. His performance and strong training camp so far may have moved him ahead of Ty Chandler for the No. 3 running back role, the St. Paul Pioneer Press reports.

Scott and Chandler will likely battle for the No. 3 role the rest of training camp, and the loser may not make the 53-man roster. Chandler is used on kickoff returns, which could give him a slight edge. Still, Scott continues to be trending in the right direction.

Chubb (concussion) returned to practice Monday, Jonathan M. Alexander of the Houston Chronicle reports.

The report notes that Chubb, who went through the NFL's concussion protocol after taking a hard hit to the head this past Tuesday, sported a red non-contact jersey in his return to practice. Assuming no setbacks, the veteran running could see some snaps in Saturday's preseason game against the Panthers. Chubb's return to the mix is of particular import to the Texans, given that incumbent starting RB Joe Mixon (foot/ankle) remains sidelined.