David Harris returned to the practice field Thursday for the first time after missing two days with a sprained right ankle.
He told reporters his ankle is "getting better" and he hopes to be ready for Saturday's AFC wild-card game against Cincinnati.
"I've been up here all day getting treatment and doing rehab and everything," the Jets' leading tackler said.
"It's real frustrating. To get hurt the last game of the regular season, the biggest game of my season, so far, it's just been tough on me this week. But I'm doing everything I can to get back out there with my teammates."
Harris was in his usual inside linebacker spot during practice and didn't appear to be hampered by the ankle, which he said "felt a little stiff."
He said the injury occurred on Jets cornerback Dwight Lowery's first-half interception during last week's 37-0 win over the Bengals.
"I was blitzing and I got hit high-low, which means I was being blocked and their fullback came in and chopped me real low," Harris said.