- Independent Research - Synthetic Turf Council." Independent Research - Synthetic Turf Council. Synthetic Turf Council, n.d. Web. 15 Oct. 2014. <http://www.syntheticturfcouncil.org/?page=Research#player>.
- Seifert, Kevin. "Inside Slant: Knee Injuries on Rise Overall." ESPN. ESPN Internet Ventures, 11 Dec. 13. Web. 15 Oct. 2014. <http://espn.go.com/blog/nflnation/post/_/id/106384/inside-slant-knee-injuries-on-rise-overall>.
- "Anterior Cruciate Ligament (ACL) Injuries-Topic Overview." WebMD. WebMD, n.d. Web. 18 Oct. 2014. <http://www.webmd.com/a-to-z-guides/anterior-cruciate-ligament-acl-injuries-topic-overview>.
- Manfred, Tony. "Texans Player Says Jadeveon Clowney Blamed His Knee Injury On Houston's Notoriously Awful Field." Business Insider. Business Insider, Inc, 08 Sept. 2014. Web. 20 Oct. 2014. <http://www.businessinsider.com/jadeveon-clowney-knee-injury-2014-9>.