By Andrew McCarty On Friday afternoon, the football world learned that a veteran player announced his retirement under unfortunate circumstances. Kylie Fitts, a veteran linebacker for the Arizona Cardinals, announced his retirement from the game. He said he was forced into the decision following a series of concussions. After 21 years of playing, football has come to an end for me,” Fitts wrote. “Due to too many concussions and the severity of my recent one, it is no longer safe for me to continue to play. I am so grateful for this game and everything it has taught and brought into my life.” F…