Speculated yesterday, but made official today, San Francisco 49er Linebacker, Patrick Willis has announced that at the age of 30 he will be retiring from active competition in the National Football League.The news has taken many by surprise in the Bay Area as Willis had previously told media and fans that he was planning to return to the gridiron.Drafted eleventh overall by the Niners in 2007 out of the University of Mississippi, Patrick Willis would make an immediate impact going to his first of seven consecutive Pro Bowls, becoming one of only three defensive players to make seven straight trips…