Wagner played a significant role in the Steelers' championship teams of the 1970s, recording interceptions in the team's first two Super Bowl titles. He was drafted in 1971 and played 10 seasons with the team, earning 36 interceptions and two Pro Bowl nods.
The Steelers announced Wagner's death without providing a cause. The team praised his toughness and consistency, which were paramount to their secondary during their championship years.