Manziel will be immediately eligible to play for the Express, an AAF spokesperson said.
Manziel was available to the AAF after the Montreal Alouettes of the CFL released him earlier this month and then said he could not play for any other team in its league.
The Alliance of American Football announced Saturday night that it has signed the quarterback and that he was claimed on waivers by the Memphis Express after the San Antonio Commanders relinquished his rights.
Former Heisman Trophy victor and NFL burnout Johnny Manziel will get his next chance on a football field in the Alliance of American Football.
The 2012 Heisman Trophy-winning quarterback is the third high-profile passer on the team's roster, slotting in alongside Zach Mettenberger and Christian Hackenberg.
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Physically, technically, he is improving tactically. "He can become one of the best midfielders not only in England but in Europe".
Now he's signed an agreement to join the Alliance of American Football, a source told ESPN's Adam Schefter.
The Memphis Express have the AAF's worst record at 1-5, followed by the Salt Lake City Stallions at 2-4, with the Arizona Hotshots and Atlanta legends both sitting at 2-3.
Manziel most recently played in the Canadian Football League with the Montreal Alouettes, but he was released by the team in February after violating the conditions he agreed to in order to play in the league. Former Troy quarterback Brandon Silvers replaced Mettenberger in the loss in Utah.
Manziel eventually ended up signing with Hamilton in May 2018 but was unable to get on to the field behind starter Jeremiah Masoli. He went on to be selected in the first round of the NFL Draft by the Browns in 2014. In 2016, a domestic assault charge against Manziel in Dallas was dismissed after he took an anger management course and participated in the NFL's substance abuse program.