Bush was released by the Lions earlier this month.
Bush, 29, signed a four-year, $16 million contract that included a $4 million signing bonus back in March of 2013. He had base salaries of $3.25 million and $3.75 million coming his way in the final two years of the agreement.
In 2014, Bush ran for 297 yards on 76 carries (3.9 YPC) to go along with 40 receptions for 253 yards receiving and two total touchdowns over the course of 11 games.
Pro Football Focus has Bush rated as the No. 14 running back in the league last year out of 57 qualifying players.