Aaron Rodgers is officially back. The veteran quarterback has now signed a one-year deal with the Pittsburgh Steelers, confirming that he'll be around for one more season. After months of speculation that included retirement talks, NFL fans will get to see Rodgers playing for at least one more year.But the veteran QB will have a different number once he's playing for the Steelers. Just as it happened with the New York Jets, he'll have to wear the No. 8, which gives different vibes from what he used to wear with the Green Bay Packers.After Rodgers officially signed his contract and his jersey number was revealed, NFL fans reacted to the fact that he'll not be No. 12 with the Steelers."Because 12 wasn’t really on the table," one fan said."Doesn’t look right at all," another fan commemted."Yeah we figured. Although I would’ve erased any reference to the Jets if it was me," a fan wrote.Here are other fan reactions:"8 for how many games they’ll win," one fan tweeted."Probably match the number of wins!!" another fan posted.Why is Aaron Rodgers not allowed to wear No. 12 with the Jets and the Steelers?Although Aaron Rodgers has made this number legendary in Green Bay, it was not available for him to wear in his new teams. That's because their No. 12 jersey was already retired.The Jets have retired the number in honor of former quarterback Joe Namath, who guided the franchise to their Super Bowl III win over the Indianapolis Colts, the only Jets' Super Bowl win to this day. Namath played for the team between 1965 and 1976 before finishing his career with the LA Rams.The No. 12 jersey in Pittsburgh isn't officially retired. However, it was worn by Terry Bradshaw from 1970 to 1983, and he became a legendary QB for the franchise, winning four Super Bowls during the span. Both Namath and Bradshaw are members of the Hall of Fame.Rodgers switched to No. 8 because that was the number he used to wear in college while playing for the California Golden Bears. Although he didn't have much success wearing No. 8 with the New York Jets, he'll hope to flip the script in his new team in what could be his final years in the league.