On Saturday, Jaden Nixon’s dream came true. The big-play running back, who is a second cousin with the legendary Adrian Peterson, was signed by the Green Bay Packers. “It’s unreal,” Nixon told Packers On SI this week. “I still haven’t fully processed it. I’m sitting here thinking I’m going to be out there in a few days with some of the best of the best. I got this opportunity to go out here and do me, play my game and just play football, have fun, you know what I mean? “That’s all I want to do. I love playing football because it’s fun to me. So, it’s not going to be a job to me. It’s something that I get to wake up and do every day. So, just to have this opportunity with these players and the coaches and the environment, I’m blessed, man.” The Packers selected six players and added 11 undrafted free agents during last week’s NFL Draft, with those 17 rookies making their debut on Friday at the rookie minicamp. Nixon is the only running back, a position of need , added to the roster this offseason.…