OK, so i'm a offensive lineman in middle school football.... i have played offensive line for 4 year's (including this year), and i always see lineman in college football with these things going around there knees down to there calfs... and io m wondering what they are, are they suports for your knees or something like that.... thy look like this http://static.nfl.com/static/content/catch_all/nfl_image/pollack.jpg