In his 28 seasons in the NFL, he was selected as the referee in three Super Bowls, XIII in 1979, XVI in 1982, and XIX in 1985.
Following college, Haggerty played minor league baseball in the Detroit Tigers organization, including one year with the Denver Bears in 1953.
At Super Bowl XIX, he supervised the coin toss that was conducted by President Ronald Reagan from the Oval Office of the White House via satellite, with Pro Football Hall of Fame running back Hugh McElhenny joining captains from the Miami Dolphins and San Francisco 49ers at Stanford Stadium in California.
Haggerty died from cancer in 1994 at age 67 and is buried at Linn Grove Cemetery in Greeley.
He was nominated as a 2005 Pro Football Hall of Fame candidate in Canton, Ohio as a contributor.