According to the NFL, a league investigation found no information that Shaw used inside information or compromised any games. Shaw has not played this season and was placed on injured reserve after a shoulder injury in the preseason opener.

The league also said it found no evidence that teammates, coaches or other players were aware of Shaw betting on games.

«The continued success of the NFL depends directly on each of us doing everything necessary to safeguard the integrity of the game and the reputations of all who participate in the league. At the core of this responsibility is the longstanding principle that betting on NFL games, or on any element of a game, puts at risk the integrity of the game, damages public confidence in the NFL, and is forbidden under all circumstances,» Commissioner Roger Goodell said in a statement. «If you work in the NFL in any capacity, you may not bet on NFL football.»

The Cardinals didn’t comment on the suspension, referring to the NFL’s statement.

The NFL did not say where Shaw placed his bets. Sports betting is now legal in 13 states after a Supreme Court decision in 2018 struck down the federal law that had limited full-scale legal sports betting to Nevada. The NFL has long been opposed to the expansion of legal gambling but since the decision has softened its stance and entered into limited partnerships with sportsbook operators.

The league also approved the Oakland Raiders move to the gambling mecca of Las Vegas, where the franchise will play starting in 2020.

Other times NFL players suspended for betting on games

Suspensions of NFL players for betting are rare. The highest-profile case was in 1963 when Paul Hornung of the Green Bay Packers and Alex Karras of the Detroit Lions were banned for the entire season. Both were reinstated the following season and Hornung went on to make the Hall of Fame.

In the most recent case, Baltimore Colts quarterback Art Schlichter was suspended in 1983 for betting on NFL games and other sporting events. He, too, was reinstated the following year.

The 27-year-old Shaw was a fourth-round draft pick by the Cincinnati Bengals out of USC in 2015. He spent three seasons with Cincinnati and was cut at the start of last season. He played four games last year for Kansas City and four games for Tampa Bay.

Shaw was signed by the Cardinals in the off-season to a one-year deal. If he wants to appeal his suspension, he has three days to file notice with the league.