Foster was charged with second degree possession, according to the website, and bond was set at $2,500.
During his rookie season, Foster showed promise at outside linebacker and compiled 72 tackles, good for second on San Francisco, in only 10 games.
The report cited the Tuscaloosa Sheriff's Office arrest database.
Well this is not the greatest start to the offseason for former Alabama star linebacker Reuben Foster.
AG: Girl can use medical marijuana at school
The girl, identified as A.S.in the lawsuit, has seizures and suffers from epilepsy after going through chemotherapy treatments. District Judge John Blakey granted the school district an exemption to administer medical marijuana to her if necessary.
Last March, Foster was dismissed from the 2017 NFL Scouting Combine after an altercation with medical staff.
A first round pick in last year's National Football League draft, Foster is now widely viewed as one of the NFL's most promising young defensive players. He blew up at medical personnel at the National Football League combine and his urine sample came back dilute, which is an automatic positive test.
The 49ers finished the season on a five-game winning streak, but still ended the year at 6-10.