Sanders made the comments while speaking to a group of kids at a Denver-area football camp on Thursday.
Sanders was asked by a camp member if he was mad about Deflategate.
"Am I mad about Deflategate?” Sanders said, according to KUSA. "I feel like I'm on ESPN with that question. ... Yeah, yeah, I'm kind of mad. I don't think that they should be the Super Bowl champion this year.
"You aren't supposed to cheat. Cheating is not good, especially when you've got guys who are working they're butts off for 365 days out of the year and one person cheats—whether it helps them win the Super Bowl or not, they still cheated and shouldn't be a champion."
The NFL started an investigation of New England after underinflated footballs were discovered at halftime of the team’s 45-7 rout of the Indianapolis Colts in the AFC Championship Game. The Patriots defeated the Seattle Seahawks 28-24 two weeks later in Super Bowl XLIX.
After attorney and independent investigator Ted Wells released his report on Deflategate, the NFL suspended Patriots quarterback Tom Brady without pay for the first four games of this upcoming season.
The report said that it was “more probable than not” Brady knew that two members of the Patriots' locker-room staff were deflating footballs.
The Patriots were fined $1 million and the team will lose a first-round draft pick in 2016 and a fourth-round draft pick in 2017.
Brady appealed the suspension and his hearing was heard this week with NFL commissioner Roger Goodell.
Sanders, who had 101 catches for 1,404 yards and nine touchdowns in his first season with Denver, and the Broncos won the AFC West for the fourth straight year. Their season ended in a loss to the Colts at home in the AFC divisional playoffs. - Scooby Axson
GALLERY: TOM BRADY AND CONTROVERSY