Alexander was released by the Seahawks in April, just 26 months after the running back signed a $62 million contract as the franchise's cornerstone. The move came after Seattle signed free-agent running backs T.J. Duckett and Julius Jones in the offseason.
"I will be playing for another NFL team this fall, and doing everything I can to contribute," said Alexander, who ran for just 716 yards in 13 games last season -- his lowest total since he replaced Ricky Watters as Seattle's lead back in 2001.
"I am healthy, energized and looking forward to beginning the next chapter of my NFL career," he said.
Information from the Associated Press was included in this report