The catch came in the second from a pass from Ben Roethlisberger in the Steelers' Week 16 game at Green Bay, and broke Yancey Thigpen's record of 1,398 yards, a mark he set in 1997.
Brown entered the game with 1,307, tying Thigpen's second best season mark from 1995.
Brown still has an outside chance at Hines Ward's single season receptions record of 112. The record breaking catch was his seventh of the game. Pittsburgh plays the Cleveland Browns in Week 17.