"I'm honest, I give myself a C," he said after practice Thursday.
But that's not how coach Rex Ryan sees it. Asked about Cromartie, who has struggled after being expected to take over leadership of the secondary in the wake of Darrelle Revis' departure, Ryan defended the corner.
"He's probably still had a Pro Bowl year," Ryan said. "I just think that sometimes, as much man [coverage] as we play and we give him the tough down, you know, down after down, sometimes you're going to get beat, and he's been beat on a couple of them."
Asked whether he has been a Pro Bowl-caliber player, Cromartie was firm.
"I don't think I am," Cromartie said. "That's from my standpoint. I think I can play a whole lot better."
"One we just misplayed the football and ran into the ref," Ryan said. "And we got beat on a couple, but everybody gets beat, there's no question. I'm glad he's on our team, though. He takes a tough down and never flinches."
After being able to rely on Revis to cover the best wide receiver on opposing teams, the Jets have been working with new personnel this season. Rookie Dee Milliner was taken in the first round but was benched in Game 2 against the New England Patriots and has missed three games with a hamstring injury.
The rookie hopes he can play Sunday in the rematch against New England.
"Hopefully I can be out there," Milliner said.
Darrin Walls was picked over veteran Kyle Wilson to replace Milliner opposite Cromartie. Walls has been adequate, but the tandem isn't the security blanket that the Revis-Cromartie combination provided.
Cromartie said he hasn't been as aggressive off the line of scrimmage.
"I'm bigger than every receiver I'm facing up against, so that's something I have to go do. It's been a tough year for me," Cromartie said. "I don't consider this being me playing at a Pro Bowl caliber. I definitely want to pick my game up, and these guys understand that, also."