3. Lamar Miller
Veteran running back Lamar Miller is currently signed to the New Orleans Saints practice squad and if the LA Chargers really wanted a veteran presence then they should give Miller a call. Miller has been in the league since 2012 and has seen everything there is to see.
There is the possibility that Miller simply does not have much left in the gas tank and has little to no impact on the Chargers. After all, the veteran running back really hasn't played since the 2018 season. He did not play at all in 2019, appeared in just one game in 2020 and has not played yet in 2021.
Miller tore his ACL in the preseason before the 2019 season, which seemingly has put an end to his career. All Miller might need to prove he still has something to offer is a chance, though, and with how bad the running back room is it would not hurt to give him a chance.
Miller was really good in his prime as well. Heck, he was a Pro Bowler in 2018 that rushed for 973 yards with five touchdowns. He has two 1,000-yard seasons under his belt and from 2013 through 2018, Miller ranked second in the entire league in rushing yards.
His days as an elite running back are over but this is someone who knows what it takes to be one of the best running backs in the league that has not put any miles on his legs for the last two years. Sure, he is old and his prime is definitely behind him, but it is a chance worth taking.
And if it does not work out then he is not going to be any worse than what the team already has.