Chris Warren

Warren checked in around 260 pounds in late June, up from the 247 pounds he weighed at the 2018 combine. Schrock also reported that the 23-year-old "looked bulkier on Saturday," which seemingly was the deciding factor for Oakland's decision to sign James Butler and waive Warren.

Warren had such promise heading into the offseason, as general manager Mike Mayock even said he was excited to see the young running back in practice. Warren made a bid for the 53-man roster as an undrafted rookie in 2018 after he led the NFL with 292 rushing yards during the preseason, ultimately being stashed on injured reserve with a knee injury instead. In a corresponding move, the team signed fellow running back James Butler.

Warren apparently has put on weight since last year's combine, where he ran a 4.69 40-yard dash while checking in at 6-foot-2, 247 pounds. His new weight likely makes him the largest halfback in the league, which could prove useful for blocking on special teams. With Josh Jacobs, Jalen Richard and Doug Martin all expected to have spots on the 53-man roster, Warren and 205-pound scatback DeAndre Washington seem to be competing for the possibility of a single job. Undrafted out of Texas last year, Warren ran for a league-high 292 yards during preseason and then spent the entire regular season on injured reserve with a knee issue. There hasn't been any report of the injury impacting his participation in Oakland's offseason program.

Warren remains firmly in the mix for a chance at a roster spot behind starter Marshawn Lynch heading into Thursday's preseason finale against Seattle, as the undrafted rookie has shown his value throughout the first few exhibition contests. Given their light preseason workloads, both Lynch and fellow veteran Doug Martin appear to have secured their positioning on the depth chart while Jalen Richard and DeAndre Washington (knee) present Warren's main competition for a role in the backfield. Washington isn't slated to play Thursday after recently undergoing arthroscopic surgery, however, so there will be plenty of reps for Warren and Richard to split.