Former Alabama running back Trent Richardson signed a contract with the Baltimore Ravens on Monday, and we already know that it was worth $675,000 on a one-year deal. Now we know how much of that salary is guaranteed.

Zero.

Richardson, who has bounced around four different rosters since being traded by the Cleveland Browns in 2013, will need to make the regular season opening day roster in order for the Ravens to honor his contract.

He’s one of six running backs on Baltimore’s roster and will compete against Buck Allen, Justin Forsett, Terrance Magee, Lorenzo Taliaferro, and Terrance West.

Richardson (5-foot-9, 230 pounds) was a top performer on Alabama’s 2009 and 2011 national championship-winning teams. In 2011, he won the Doak Walker Award and finished third in the Heisman Trophy voting as he set what were school single-season records at the time with 1,679 rushing yards and 21 rushing touchdowns.

Of course, Derrick Henry broke both of those records during the 2015 season.

After being taken by the Browns with the No. 3 overall pick in the 2012 NFL Draft, Richardson signed a four-year, guaranteed $20.4 million contract that included a $13.6 million signing bonus. Richardson had a solid rookie debut, rushing for 950 yards and 11 touchdowns on 267 carries (3.6 ypc) while catching 51 passes for 367 yards and one touchdown.

But on Sept. 18, 2013, the Indianapolis Colts traded their first-round choice in the 2014 NFL Draft to Cleveland for Richardson. He then ran for just 977 yards and six touchdowns on 316 carries and caught 55 passes for 494 yards and one touchdown in 29 regular season appearances from 2013-14.

On March 17, 2015, Richardson signed a two-year, $3,850,000 contract with the Oakland Raiders with $600,000 of it being guaranteed. However, he missed the first part of training camp due to a bout with pneumonia and was released by the team prior to the start of the regular season.

Baltimore could end up being the final opportunity for an NFL contract for the 25-year-old running back.