The San Francisco 49ers have signed Tim Hightower.

Hightower has made one of the NFL's most remarkable comebacks during the past two years with the Saints after spending three-plus years out of the league because of a knee injury.

Hightower has a total of 2,977 rushing yards, 1,208 receiving yards and 34 touchdowns in six seasons.

Carlos Hyde is the incumbent starting running back for the 49ers.