|Date of birth:||October 11, 1989|
|Place of birth:||Lake Elmo, Minnesota|
|Height:||6 ft 4 in (1.93 m)|
|Weight:||298 lb (135 kg)|
|High school:||Stillwater Area High School|
|Career NFL statistics|
Arnfelt played defensive line for the Northwestern Wildcats. He was a team captain for his senior year, and was also an Academic All-American selection. As a senior, Arnfelt lead the Wildcats to their first bowl victory since 1948 and a 10-3 record, finishing 17th in the AP Poll and 16th in the Coaches Poll.
Arnfelt impressed scouts at Northwestern's pro day on March 5, 2013. He ran a 4.81 second 40-yard dash and bench pressed 225 lbs for 38 reps.
Following the 2013 NFL Draft on April 27, 2013, Arnfelt signed a free agent contract with the Pittsburgh Steelers. After spending time on the Steelers practice squad in 2013, Arnfelt was promoted to the active roster on December 14, 2013.
- Brian Arnfelt (2013-04-28). "Brian Arnfelt Bio - NUSPORTS.COM - The Northwestern Official Athletic Site". Nusports.Com. Retrieved 2013-11-01.
- "Scout.com: Unknown Rookie Holding 2nd Team". Pit.scout.com. 2013-07-31. Retrieved 2013-11-01.
- "Pittsburgh Steelers: Brian Arnfelt". Steelers.com. 2013-09-24. Retrieved 2013-11-01.
- Twitter / BobLabriola: Roster move for @Steelers: DE Arnfelt signed from practice squad for depth. ILB Kion Wilson waived to open a roster spot