Lululemon (LULU) announced that it will begin selling an NFL apparel line for all 32 teams with men's, women's and accessories offerings. "It's a sign that Lululemon is becoming a more mature sports company," says Morningstar's David Swartz. He says LULU has a big opportunity in men's retail believing sports-related apparel could expand that consumer base. David does say the move will more directly square LULU against Nike (NKE) and adidas (ADDYY) in the sports retail space.