NFL: Stephen Tulloch was injured doing the 'Discount Double Check'

http://www.nfl.com/news/story/0ap3000000398900/article/lions-stephen-tulloch-injured-doing-discount-doublecheck?campaign=Twitter_atl via /r/nfl http://www.reddit.com/r/nfl/comments/2h4kyu/stephen_tulloch_was_injured_doing_the_discount/