Rams running back Trey Watts has been suspended for the first four games of the 2015 season for violating the league's substance-abuse policy, according to profootballtalk.com.
Watts, who made the team in 2014 as an undrafted free agent, played in 14 games last season and rushed for 30 yards on seven carries.
Watts is eligible to return for Week 5 against the Packers.