Milliner has been out since he suffered the injury on Aug. 10, so his absence comes as no surprise. He did some light jogging and agility work in the rehab area during practice this week. There is no timetable for his return to practice.
Allen, a converted safety, will be making his first start at cornerback. Allen (concussion) and linebacker Nick Bellore (calf) are listed as probable, but coach Rex Ryan said, "In other words, they're playing."
"Seems to be coming along pretty good, but again we're gonna find out on Sunday, because there's nowhere to hide when you're on that field," Ryan said. "We feel good about it. The thing about [Allen] that we need to know is this guy has unusual ball skills -- like he can flat go up and catch it -- so if you're gonna plan on running jump balls, I like our chances.
"But is he still gonna be a little bit of a work in progress? Sure. He's doing a good job for us and again I'm excited to watch him play. He's a playmaker. We'll put him out there and see what happens."
Walls will be making just his fifth career start.
"I think Darrin Walls is a much better player now than he was last year," Ryan said.
The Jets are extremely depleted in the secondary. They thought that Milliner and Dimitri Patterson were going to be their starters at cornerback in Week 1. But Milliner is still getting over his injury, while Patterson went AWOL recently, leading to his release.
Milliner, the team's first-round pick in the 2013 draft out of Alabama, had 56 tackles and three interceptions during his rookie season, most coming later in the season after an abysmal start to his career.
"I feel good about all three of them," Ryan said. "Hopefully they can play next week, but for this week all three of those guys are out."