Antonio Brown returned to Oakland Raiders practice on Tuesday after being away from the team for much of last week — and he said his injured feet are feeling "a lot better."

Brown spoke briefly with reporters in Napa, California about his injury — which, according to a report from Pro Football Talk, stemmed from wearing impromper footwear during cryotherapy. 

"(I'm feeling) a lot better," Brown said. "Working towards 100 percent. It's been a process with the feet. Any time you got a lot of blisters, it's hard to change direction, cut and run and be able to do what I do naturally."

Coach Jon Gruden said he isn't sure if Brown will suit up for Oakland in the preseason, but he expects Brown to be ready by Week 1.

When asked when he'll return to practice, Brown told reporters to "stay tuned."

Brown also said he is working with the NFL to find an approved helmet to wear for the upcoming season after an arbitrator rejected his grievance against the NFL on Monday. The 31-year-old wide receiver, who was traded to Oakland during the offseason, has wanted to wear his old helmet even though it has not been certified for use in 2019. (The National Operating Commission on Standards for Athletic Equipment does not certify helmet models that are more than 10 years old.)