Wallace has not signed his $2.742 million restricted free-agent tender.
"We're excited to get Mike back. I talk to him all the time, and you know he's one of us," quarterback Ben Roethlisberger told NFL.com and NFL Network's Kimberly Jones during halftime of the Steelers' 38-7 preseason victory over the Buffalo Bills on Saturday. "He's one of our boys, we are like family. So when he gets back, we are going to be excited."
Wallace caught 72 passes for 1,193 yards and eight touchdowns last season, when he made his first Pro Bowl.