MOBILE, Ala. (AP) — Former Oakland Raiders quarterback JaMarcus Russell has been charged with possession of a controlled substance — codeine syrup — after being arrested Monday at his home in Alabama, authorities said.The 24-year-old former LSU star and the No. 1 draft choice in 2007 was arrested as part of an undercover narcotics investigation, said Mobile County Sheriff’s spokeswoman Lori Myles. She would not say what led to his arrest. She said he did not have a prescription for the codeine.Russell, who graduated from high school in Mobile, was booked into the city jail and released soon afterward on $2,500 bond, online records show.The Raiders released Russell, considered one of the NFL’s biggest draft busts, in May after he won only seven of his 25 starts and was benched. He completed just 52.1 percent of his passes in his career with 18 touchdowns, 23 interceptions, 15 lost fumbles and a passer rating of 65.2.Russell and his agent did not immediately return calls for comment.—-Contact The Daily Reveille’s sports staff at [email protected]