A study done by the New York Times' Jonathan Bales last offseason showed that tight ends historically take their biggest statistical steps back beginning at age 31.
Ben Roethlisberger said Heath Miller has "looked healthy right from the get-go, looks kind of like the old Heath."
Heath Miller is now under contract through 2016.
The Steelers have worked out a restructured contract with Heath Miller.
ESPN Steelers blogger Scott Brown expects the team and Heath Miller to work out a contract extension "sooner rather than later."
Heath Miller caught two passes for 17 yards in Pittsburgh's Week 17 win over the Browns.
Heath Miller caught three passes for 17 yards in Week 16 versus the Packers.
Heath Miller caught four passes for 35 yards in Sunday night's Week 15 win over the Bengals.
Heath Miller caught three passes for 56 yards in Sunday's Week 14 loss to the Dolphins.
Heath Miller caught eight passes for 86 yards in Thursday night's Week 13 loss to the Ravens.
Heath Miller had five catches for 41 yards in Sunday's Week 12 win over the Browns.
Heath Miller caught eight passes for 67 yards in Pittsburgh's Week 11 win over the Lions.
Heath Miller was limited to one catch for six yards in the Steelers' Week 10 win over the Bills.
Heath Miller caught four passes for 43 yards in Sunday's Week 9 loss at New England.