Fooch's Note: Dobbs apparently confirmed it was due to the arrest last year:
Demarcus Dobbs confirms his 1-game suspension is due to the Nov. 30 arrest.— Kyle Bonagura (@KyleBonagura) August 15, 2013
The San Francisco 49ers issued a press release a few minutes ago, stating the defensive lineman Demarcus Dobbs was suspended for one game for violating the NFL Substance Abuse policy. Dobbs will miss the the team's season opener against the Green Bay Packers. Dobbs would not count against the 53-man roster during his one-game suspension.
The 49ers issued a fairly simple statement from general manager Trent Baalke:
"The San Francisco 49ers organization supports the NFL's code of conduct policy and their recent decision regarding Demarcus."
There are no specifics on what triggered the suspension. Dobbs was arrested last November for suspicion of DUI and possession of marijuana following a single-car accident. He was deactivated for the 49ers subsequent game against the St. Louis Rams. I'm reading through the Substance Abuse policy, and it's not exactly 100% clear how many violations of a given law or failed drug test result in suspensions vs. fines. I'm going to try and get a better idea of it in the policy, but it seems like it requires aggravating circumstances or repeat problems to get a suspension.
Dobbs is eligible to play in the remaining three preseason games. He has been Justin Smith's primary backup thus far, and is competing with Will Tukuafu, Tony Jerod-Eddie and Lawrence Okoye for playing time. Tank Carradine and Quinton Dial will eventually figure into the defensive line mix, but for now they remain on the Non-Football Injury list.