As up-and-coming Giants running back Ahmad Bradshaw is getting his preseason workouts by doing push-ups in confined quarters and running a tin cup over steel bars, the team is preparing to lock up (not in the Ahmad Bradshaw way) their current starter for several years into the future.

Per Vinny DiTrani of the Bergen Record (via our pals at Rotoworld.com), an agreement could be reached soon between the Giants and running back Brandon Jacobs on a four-year deal.

Jacobs currently is signed through 2008, at a base salary of $927,000.

The team expected Jacobs to replace Tiki Barber in 2007.  But Jacobs suffered a knee injury in Week One, opening the door for Derrick Ward and Reuben Droughns.  Bradshaw came along late in the season, and helped form a new Thunder-and-Lightning combination with Jacobs during the team’s stunning postseason run.

Despite playing in only 11 regular-season games and starting nine in 2007, Jacobs rushed for 1,009 yards, averaging five per carry.