Per NBC Sports Bay Area's Matt Maiocco, Foster called this offseason "a big learning experience" that gave him a new perspective on things.
"I learn from every mistake, everything that's said, all my flaws," he said. "I learned from a lot of things and just grew from it. It made me appreciate football a lot better. It was crazy, knowing that football can be gone. Being back on this field with my brothers and these coaches, man, is a blessing."
Foster was arrested twice in less than one month during the offseason. He was charged with possession of marijuana in January, with the Tuscaloosa County Sheriff's Office releasing him from jail after he posted a $2,500 bond.
Following a February arrest on suspicion of domestic violence, threats and assault weapon possession, Foster was charged with felony domestic violence after his then-girlfriend Elissa Ennis told police he punched her in the head, dragged her by the hair and threw her out of his home.
During the preliminary hearing in May, Ennis testified that he never hit her and she made false accusations against him.