He played college football for the Duke Blue Devils, and was signed by the Carolina Panthers as an undrafted free agent in 2016.

He committed to Ohio State University to play college football in the spring of his junior year (April 2010).

Cash bypassed his last semester in high school to enroll at Ohio State early, in January 2011.

[6][7] Cash considered entering the 2015 NFL draft, but decided to return to Duke for his senior year.

On December 16, 2015 it was announced that Cash would forgo Duke's Pinstripe Bowl against Indiana to have wrist surgery.

It was reported ten teams had showed up at Duke's Pro Day including the Pittsburgh Steelers, Carolina Panthers, New Orleans Saints, Arizona Cardinals, and Atlanta Falcons.

At the conclusion of the pre-draft process, Cash's projected draft position fell to the fourth or fifth round.

[16] As soon as the draft concluded, 20 NFL teams immediately contacted Cash and offered to sign him as an undrafted free agent.

He chose to sign with the Carolina Panthers, who signed him as an outside linebacker and intended for him to play one of the hybrid linebacker roles that have become popular among NFL teams in recent years, like Deone Bucannon of the Arizona Cardinals and Mark Barron of the Los Angeles Rams, who have had success after switching from safety.

[25] On August 13, 2018, Cash was waived/injured by the Cardinals after suffering a torn ACL and MCL during the preseason and was placed on injured reserve.