During open portion of Rams practice, RB Tre Mason did not participate. He worked on side with training staff as he rehabs hamstring (Nick Wagoner on Twitter)
Nerdy Football Analysis: Mason will likely be labeled a gametime by the coaches this week. He has a chance to be the lead running back early in the season with Todd Gurley being eased along in his ACL recovery. If Mason is unable to play against the Seattle, Benny Cunningham would likely get the start.