Burt James Ray Mansfield (January 21, 1941 – November 3, 1996), nicknamed "Ranger", was an American professional football player who was a center in the National Football League (NFL) for the Philadelphia Eagles and Pittsburgh Steelers.

He played college football at the University of Washington in Seattle under head coach Jim Owens.

He switched to offense and was their starting center for a decade, from 1966 until 1976,[5] and was a key member of the Steelers' Super Bowl-winning teams of the 1974 and 1975 seasons.

"[3] He retired from pro football in July 1977,[11] and went on to a successful career as an insurance broker in the Pittsburgh area, previously his off-season job.

[3] Known by his Steeler teammates as "Ranger" for his love of the outdoors, Mansfield died at age 55 from a heart attack while hiking with his son in the Grand Canyon in Arizona in November 1996.