The running back group was a bit short today to begin with. Undrated rookie Chris Warren III was not practicing, leaving just four running backs, which isn’t a lot to work with in camp. Then they lost another back. Jalen Richard left practice with what is being reported as a calf strain according to Michael Gehlken of the Las Vegas Review Journal.
Raiders RB Jalen Richard has been diagnosed with a calf strain, source said. He exited today’s practice. Team expected to sign a running back. Roster at 89.
— Michael Gehlken (@GehlkenNFL) July 29, 2018
Now down to three running backs, the team absolutely need to bring in another running back as right now they have just Marshawn Lynch, Doug Martin, and DeAndre Washington.