Crimson Tide coach Anthony Grant said Wednesday that Jacobs requested the leave starting with Thursday's game at Texas A&M.
Grant says in a news release that he met with Jacobs this week "regarding a pattern of behavior and inconsistencies with his responsibilities as a student athlete." He didn't give a timetable for Jacobs' return.
The coach says both felt it was in Jacobs' best interest "to step away from the team for the immediate future."
The 6-foot-8 Jacobs is third on the Tide in scoring, averaging 8.4 points a game. He scored 18 points in last week's win over Mississippi but followed that with two points in a loss to South Carolina.
Jacobs has started 10 games.