Spencer Hadley (born October 30, 1989) is an American former professional football player who was a linebacker in the National Football League (NFL). He played college football for the BYU Cougars from 2008 to 2013. He served a two-year Mormon mission in the Rosevile California Mission from 2009 to 2010.
Hadley was signed by the New Orleans Saints on May 12, 2014, but was later released.
Hadley was signed by the Oakland Raiders on August 6, 2014, and was a member of the practice squad, up until December 20, 2014, when he was added to the active roster. He was waived September 5, 2015.