The 33-year-old injured a wrist in the season opener against Sale and missed the subsequent defeats to Northampton and Bath.
That leaves him with Premiership games against Gloucester and Saracens and a European Challenge Cup tie against Agen to impress Eddie Jones ahead of the autumn internationals.
The England head coach names a training squad tomorrow — expected to be about 36-strong — for a three-day camp in Bristol, starting on Sunday, before naming his autumn international party on October 18.
England then head to Portugal for a week, arriving home just two days before the opening Test against South Africa on November 3.
Brown started the Sale game on the left wing despite playing full-back for England a record 54 times in his 72-Test career. He started all three Tests on England’s summer tour to South Africa on the wing, hinting at a change in Jones’s thinking.