According to ESPN, Jacobs won't have an opportunity to play for the 49ers until the playoffs.
49ers announce they have suspended RB Brandon Jacobs for the final 3 games of the 2012 regular season. Jacobs has 5 carries all season.— NFL on ESPN (@ESPNNFL) December 10, 2012
Jacobs has played in only two games this season, most recently in the 49ers' 16-13 overtime loss to the St. Louis Rams on December 2.
The 49ers are already under a lot of pressure to make another deep playoff run and don't need distractions and unhappy players when the team should be focusing on the goals they have for the rest of the year.
Jacobs can be a productive player in certain situations, but there's no doubt that the 30-year-old is passed the prime of his career and no longer someone who can feature in a prominent role in the offense.
The 49ers have the second-best rushing attack in football with an average of 161.5 yards per game on the ground, so there's no need to keep Jacobs when the running game is achieving great success without him.
Frank Gore is one of the best all-around running backs in the league thanks to his ability to catch passes out of the backfield, and LaMichael James is a quality backup capable of making big plays.
The addition of young quarterback Colin Kaepernick into the starting lineup has also given the 49ers another player who can impact the game with his running ability.
Signing a veteran running back like Jacobs who has Super Bowl experience wasn't a poor move by the 49ers in the offseason, but it's clear that the veteran's time in San Francisco needs to end.
Head coach Jim Harbaugh cannot have his team dealing with an unhappy veteran when there are more important things to worry about over the final few weeks of the season, including a tough matchup with the New England Patriots on the road in Week 15.
The 49ers need to release Jacobs before the playoffs to avoid any potential distractions.