Stevan Ridley doesn't solve Jets' running-back riddle

A few thoughts on the New York Jets signing running back Stevan Ridley, formerly of the New England Patriots:

1. It's hard to poke holes in a low-cost acquisition -- a one-year contract, probably for less than $1 million -- but the Ridley addition comes with questions.

2. The questions start with his health. He underwent ACL surgery last Nov. 17, meaning he'll be eight months removed from it when the Jets open training camp. We've seen running backs rebound the following year from major knee surgery (Adrian Peterson, anyone?), but it might be a stretch to expect Ridley to contribute early in the season. The fact that he's only 26 should help.

3. How does his skill set improve the backfield? Ridley is another version of Chris Ivory, a between-the-tackles runner who plays primarily on first and second down. Where's the speed? The Jets need a home run threat, a back who can make plays in space. Maybe they can find that guy in the draft; he's not currently on the roster. Ridley's longest run is only 43 yards, he doesn't catch the ball (23 career receptions) and he has ball-security issues (nine fumbles in 3½ seasons).

4. You have to wonder if the new regime has questions about Ivory, the Jets' leading rusher last season. Ivory is not an ideal fit in Chan Gailey's spread offense, so this could be an insurance move by Mike Maccagnan. Remember, the Jets also re-signed Bilal Powell for $2 million on a one-year contract.

5. For Ridley, it's a good situation. He gets a year to show the league he's healthy, maybe convincing a team next year in free agency that he can be the same back he was in 2012. That's when he rushed for 1,263 yards, looking like an up-and-comer with the Patriots. Ivory and Powell also will be free agents in 2016, meaning the Jets will be starting over at running back.