Yates reported last week the Raiders brought LeGarrette Blount and Bo Scarbrough in for workouts.
First-round draft pick Josh Jacobs has delivered out of the backfield, running for 554 yards and four touchdowns through six games.
The fact the team is casting a wide net for another running back could be a sign head coach Jon Gruden has lost faith in one or both of the team's backups, DeAndre Washington and Jalen Richard. The pair are averaging 3.6 and 4.2 yards per carry, respectively.
Gruden may prefer instead to make the running game an even bigger focus of the offense. The Raiders' 137.8 rushing yards per game are sixth-most in the NFL.
Anderson made waves toward the end of the 2018 season when he ran for 299 yards and two touchdowns for the Los Angeles Rams over the final two weeks. He then went for 123 yards and two scores in the Rams' divisional-round win over the Dallas Cowboys.
The 28-year-old's brief stint in Detroit was a return to reality. He'd likely be limited to goal-line and short-yardage situations were he to sign with the Raiders.