Jacobs has spent his entire seven-year professional career with the Giants — where he racked up 4,849 rushing yards — but has been relegated to Ahmad Bradshaw’s backup the last two seasons, and that never sat well with him.
Last year Jacobs rushed for 571 yards and seven touchdowns, but the Giants had finally had their fill with Jacobs and cut him loose several weeks ago after the start of free agency.
Jacobs won’t get any chances to become the official starter in San Francisco either, as that job is held down by Frank Gore, and he is not going anywhere barring injury.
Gore rushed for rushed for 1,211 yards and eight touchdowns for the 49ers last season.
He was a big catalyst for their success, helping them all the way to the NFC Championship game where they fell short against the Giants.
The 49ers must grade Giants players high, as Jacobs is the second New York player to sign with the team in as many weeks.
Wide receiver Mario Manningham agreed to a two-year with the 49ers, who were looking to add more playmakers to their wide receiver core.
San Francisco also signed wide receiver Randy Moss, so it’ll be interesting to see if quarterback Alex Smith can finally become the passer San Francisco had hoped when taking him number one overall in 2005.
Manningham had 160 catches for 2,315 yards and 18 touchdowns in his four-year career as a Giant. He was drafted out of Michigan in the third round of the 2008 NFL draft.