What happened: The Patriots are placing Brown on injured reserve because of a high ankle sprain, according to [Adam Schefter](https://www.fantasypros.com/nfl/news/607149/aj-brown-ankle-placed-on-injured-reserve.php). He previously left New England's opener with the ankle injury.
Why it matters: Albert Breer cautioned that the short turnaround between games could complicate Brown's comeback.
By the numbers: The injured-reserve stint will sideline Brown for at least four games, per Schefter.
What to watch: Watch for updates on Brown's practice participation as his eligibility date approaches.