The Baltimore Ravens and San Francisco 49ers are slated to appear in the Super Bowl on Sunday. However, Ravens cheerleader Courtney Lenz will not be one of those in attendance.Lenz, a five-year veteran, alleges that the team did not extend an invitation to her because she is retiring at season's end.From ABC News:"I wouldn't even have reached out and let fans know if I didn't think it was clearly wrong," Lenz told ABCNews.com. "I'm just devastated by the whole situation. This was very unexpected… I didn't even think there would be a chance of me not going with being a five-year veteran."Lenz began cheering for the Ravens when she was a freshman in college at 18. After she finished school and found a full time marketing job, she found it difficult to continue to fit cheering into her schedule and announced her retirement earlier this month. Although she retired at the end of the regular season, Lenz believes her time on the squad this year and as a veteran, entitles her to a spot on the field at the Super Bowl. She accuses the Ravens of not allowing her to cheer in retaliation for quitting."They've been really hard on me this year since I told them I was leaving," Lenz said. She received an email last week with the names of the 32 cheerleaders who would join the team in New Orleans. "I was the only three-plus year veteran that [is] not going. I immediately thought it was a mistake."Fans have since come to her aide by creating an online petition to let the 23-year old cheer in the biggest football game of his career. A team spokesperson stated that the NFL rules only allowed them to bring 32 of their 60-member cheerleading squad. Obviously, Lenz was not one of those selected.