Johnny Manziel is returning to the scene of his football glory days. (Eric Gay / AP)

His NFL career stalled out, free-agent quarterback Johnny Manziel is taking college classes at Texas A&M, where he won a Heisman Trophy as a freshman in 2012.

The free agent quarterback is working toward completion of his undergraduate degree in recreation, parks and tourism sciences and has taken more than 90 hours of courses. Manziel, an official for the school confirmed to the Dallas Morning News and Manziel’s spokesperson confirmed in an email to The Post, is listed as a senior and his name, Johnathan Manziel, appears in the school directory. It isn’t clear at present how much of the coursework Manziel will be completing online.

Manziel, who will turn 24 in December, left A&M with two years of football eligibility remaining, but cannot return to that sport for the Aggies. Perhaps he’ll go the Tim Tebow route and give another sport — he played baseball in high school — a try. Manziel was the 22nd overall pick by the Cleveland Browns in the 2013 NFL draft, but was released by the team after two seasons for multiple behavioral issues.

Manziel currently has been suspended four games for violation of the NFL’s substance abuse policy and, in an unrelated matter, is awaiting resolution of a misdemeanor domestic violence case involving his former girlfriend. The NFL is investigating that matter and if Manziel were to be signed by an NFL team, he could face further discipline under the league’s personal conduct policy.