Tomlin said he saw Brown on Tuesday morning.
"His progress is going well," he said.
Brown suffered a partially torn calf muscle in Week 15 against the New England Patriots.
Before suffering the injury he became the first receiver in NFL history with five consecutive seasons with triple-digit receptions, breaking his tie with Marvin Harrison at four.
He finished the regular season with 101 catches, 1,533 yards and nine touchdowns.
The Steelers (13-3) finished the season with the No. 2 seed in the AFC and a first-round bye.