Dallas Mavericks star Cooper Flagg on Tuesday revealed that he isn't a big fan of the NFL. But when asked if he supports any team, Flagg claimed he used to back the New England Patriots before shifting his loyalty from the $9-billion franchise to the Dallas Cowboys.Flagg shared this during a conversation with Dallas beat writer Mike Curtis, who asked the rookie which NFL team he supports."I was a Patriots fan growing up just 'cause that's the closest one to Maine, but I'm not a huge football fan in general," Flagg revealed.However, Flagg quickly switched his loyalty to the Dallas Cowboys when asked for his thoughts on the Texas franchise."I'm a Cowboys fan now," Flagg said.Flagg traded his allegiance to the Cowboys, having become a part of a Dallas franchise himself. Drafted as the first overall pick by the Mavericks, the rookie has made an immediate impact with the team.Flagg has been a rare bright spot during the Mavs’ difficult 9-16 start. He leads the team in scoring with 17.3 points, along with 6.3 rebounds and 3.3 assists per game. His strong play also earned him Western Conference Rookie of the Month honors.Having already become a Mavs fan favorite, Flagg’s shift from the Patriots earned him plenty of love from Cowboys fans as well."@dallascowboys send him some gear and invite to the sideline next home game," a fan wrote."Coop just gets it," another added.MFFL 💙💙 @Marcus709TxLINK@MikeACurtis2 @dallascowboys send him some gear and invite to the sideline next home game 💙#SourceTrustMe @Z_MavsLINKCoop just gets itCooper Flagg reflects on Duke winning its first ACC football championship since 1989Cooper Flagg's alma mater, Duke's football team, scripted history on Saturday as they secured their first ACC football championship since 1989. The team upset Virginia in a thrilling 27-20 overtime win as they reached the pinnacle of their conference for the first time in 36 years.On Tuesday, Flagg reflected on their victory during a practice media availability."I thought it was pretty good. I am not huge into college football, but obviously, it is good for Duke, for them to get a big win and win the conference. I think it is huge," Flagg said (Timestamp: 9:03 onwards).Duke broke through in overtime on the fourth play, with Darian Mensah finding Jeremiah Hasley for a one-yard touchdown. The Blue Devils then sealed the win when linebacker Luke Mergott came up with a game-clinching interception to secure the league title.