|Date of birth:||September 26, 1961|
|Place of birth:||Alpena, Michigan|
|Height:||6 ft 6 in (1.98 m)|
|Weight:||290 lb (132 kg)|
|High school:||Denton (TX)|
|NFL Draft:||1985 / Round: 2 / Pick: 47|
|Career NFL statistics as of Week 16, 1986|
|Player stats at PFR|
Behning was born in Alpena, Michigan and attended Denton High School in Denton, Texas, where he was named all-state in football in 1979. He also earned the rank of Eagle Scout in the Boy Scouts of America.
He matriculated at the University of Nebraska. At Nebraska, Behning was named to the Academic All Big 8 first-team in football in 1984. He was also named an All-American in 1984 by the National Strength and Conditioning Association. He played on the North team in the 1985 Senior Bowl.
Behning was drafted by the Pittsburgh Steelers in the second round of the 1985 NFL Draft. He was on the Steelers roster for three seasons, though he was active only in 1986. He spent his rookie season on injured reserve after breaking his arm in training camp. His only start in his career came in 1986. An Achilles injury cut short his career. After being cut by the Steelers during training camp in 1988, he was picked up by the San Diego Chargers, but never played in the NFL again.
Behning teaches industrial technology and coaches varsity football and track at his alma mater, Denton High School. He currently holds the position of Assistant Coach - Offensive Line for the Denton High Broncos football team. He holds an engineering degree from Nebraska as well as a Masters of Education from Southeastern Oklahoma State University.
Behning is married (Nanette) and he has two daughters, two sons and two grandchildren.
- "Mark Behning bio". Denton High School. Retrieved 18 February 2010.
- "North roster decided for Senior Bowl game". Associated Press. December 23, 1984. Retrieved 18 February 2010.
- Smizik, Bob (April 23, 1990). "Sour Steelers career gives Behning sweet memories". Pittsburgh Press. pp. C2. Retrieved 18 February 2010.
- Cook, Ron (September 3, 1985). "Time will tell how Art Rooney Jr. fared". Pittsburgh Press. pp. C5. Retrieved 18 February 2010.
- "Bronco Coaches". Denton High School. Retrieved 18 February 2010.