AL.com says the Tuscaloosa County Sheriff's Office arrest database indicates Foster, who just finished his rookie season, was arrested Friday.
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Audience members started to heckle and slow-clap, during which security appeared. The protestor then accused the Fabian Society of "subverting" the constitution.
Under Alabama state criminal law, second-degree possession is a Class A misdemeanor.
In order to draft Foster, the 49ers dealt their second-round pick (No. 34 overall) and a fourth-rounder acquired from the Chicago Bears earlier on draft night (No. 111 overall) to the Seattle Seahawks for pick No. 31. He also submitted a diluted urine sample for a drug test at the Scouting Combine, which in the National Football League is considered the same as a positive test.
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They play at home. "I think we played with a lot of top players against Arsenal , and then again today against a very good team. Antonio Conte attributed Chelsea's lacklustre performance in Saturday's goalless draw against 10-man Leicester to fatigue.
The arrest comes almost two weeks after Foster closed out his rookie season, finishing second on the 49ers in tackles with 72 in 10 games.
Although he missed six games with a knee injury, Foster had an excellent rookie season when he was healthy enough to play.
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Democratic Senator Ben Cardin was elected in 2006 to that seat and is expected to run for re-election this year. Cardin is Maryland's senior US senator, elected in 2006 and re-elected in 2012.
When Lynch was directly asked about the diluted sample, he made it clear he was not concerned.