The New England Patriots' star quarterback, 37, was suspended by the league in May following an investigation.
New England Patriots owner Bob Kraft said the NFL's decision to uphold Tom Brady's four-game suspension for his alleged role in "Deflategate" is 'unfathomable."
The Patriots star quarterback, 37, was suspended by the league in May after an investigation found it was "more probable than not" that Brady was aware that personnel had deflated balls for the AFC championship game last season.
After his suspension was upheld on Tuesday, Brady said he was "very disappointed."
"I did nothing wrong, and no one in the Patriots organization did either," Brady wrote in a lengthy Facebook post on Wednesday.
"Despite submitting to hours of testimony over the past 6 months, it is disappointing that the Commissioner upheld my suspension based upon a standard that it was 'probable' that I was 'generally aware' of misconduct."
At a news conference on Wednesday, team owner Kraft added that he "unequivocally" supports Brady, whom he called "a person of great integrity and... a great ambassador of the game both on and off the field."
"I was wrong to put my faith in the league," Kraft added, calling the process "extremely frustrating and disconcerting."
On Tuesday, as the NFL announced its decision, they also revealed that Brady destroyed his phone during the investigation. It meant 10,000 text messages were destroyed.
Read: Tom Brady Breaks His Silence on NFL Deflategate Report
"He did so even though he was aware that the investigation had requested access to text messages and other electronic information that had been stored on that phone," NFL Commission Roger Goodell wrote.
Brady's agent previously said the football player would often destroy an old phone when he got a new one so that his information could not be retrieved.
The investigation earlier this year found that it was "more probable than not" that Brady was "at least generally aware" that personnel had deflated the balls.
At the time, Brady fired back in a statement via his agent, calling the report "a significant and terrible disappointment" that "contains significant and tragic flaws."
The Patriots, who ultimately went on to win the Super Bowl, were fined $1 million over the incident and were stripped of a pair of draft picks.
The team didn't appeal the penalty but Brady appealed his four-game suspension and a hearing was held on June 23. Goodell oversaw the hearing, saying he needed to protect the integrity of the league.
Read: NFL Report Says Tom Brady Was 'Generally Aware' of Deflategate
The NFL announced its decision to uphold the ban on Tuesday. Brady will miss the first four games of the season unless he takes the case to court.
Brady and the team have denied knowing that they were using deflated footballs in the AFC title game against the Indianapolia Colts in January.
Watch Below: Tom Brady reaks His Silence on NFL Deflategate Report
