It said it would not honor a contract signed with any other CFL team but did not disclose Manziel's specific contractual violations. The Alouettes released Manziel in early 2019 when CFL announced Manziel had "contravened the agreement which made him eligible to play in the league".
Johnny Manziel is headed back to the United States to play football, and it will be in Memphis, Tennessee.
Manziel had previously said on Barstool Sports' Comeback SZN podcast that he was intrigued by the prospect of playing in either the AAF or the XFL, which begins operation next year.
Manziel's player rights initially belonged to the San Antonio Commanders based on the AAF's college-allocation system.
The eight-team AAF is midway through its inaugural season this spring.
Christchurch shooting: Gunman opens fire at mosque in Hagley Park
He clarified that both the teams as well as the support staff were safe and that they support the decision to cancel the match. As their bus approached, the players saw "blood-stained people staggering out the mosque", Mashud said in the video.
The AAF team with the lowest win-loss percentage held the first crack at Manziel through the league's waiver process.
The Express have struggled to find a successful quarterback so far this year, which could provide Manziel a quick opportunity to take the field.
Adam Schefter reported Saturday night that Manziel has signed a player agreement with the AAF, which is now in Week 6 of a 10-week regular season. With a league-worst 1-5 record, the Express has not had much success in the passing game behind former LSU quarterback Zach Mettenberger, who left Saturday's game with an injured ankle. Hackenberg threw two interceptions in the first half of the Express' game against the Orlando Apollos last month before he was benched.
The 2012 Heisman Trophy victor at Texas A&M had his contract with the CFL terminated this offseason. He went on to be selected in the first round of the NFL Draft by the Browns in 2014.