Yankey attended Centennial High School in Roswell, Georgia, where he earned four varsity letters playing as an offensive lineman for head coach Jeff Measor. He was a three-time All-region selection. As a senior, he earned honorable mention All-state honors. He also earned Centennial's Excalibur Award, an award that honors excellence in athletics, character, and leadership.
Yankey was selected by the Minnesota Vikings in the fifth round (145th overall) of the 2014 NFL draft.[4]
On September 5, 2015, he was waived by the Vikings and was signed to the practice squad the next day.[5][6]
Carolina Panthers
The Carolina Panthers signed Yankey to a futures contract on January 12, 2016.[7] On September 3, 2016, he was waived by the Panthers as part of final roster cuts.[8] The next day he was signed to the Panthers' practice squad.[9] He was promoted to the active roster on November 25, 2016.[10]
Yankey was born in Sydney, Australia to David and Darina Yankey. He retained his Australian citizenship after his family moved to Roswell, Georgia when he was eight.[12] He became a U.S. citizen in 2014.[13]