MANY SPORTS (specific application of physics per type of sport)
http://www.topendsports.com/biomechanics/sportspecific.htm
MANY SPORTS (Physics principle)
http://www.topendsports.com/biomechanics/physics.htm
EXPLORITORIUM
http://www.exploratorium.edu/hockey/
http://www.exploratorium.edu/skateboarding/
http://www.exploratorium.edu/cycling/
http://www.exploratorium.edu/baseball/
http://www.exploratorium.edu/hockey/
NBC LEARNING
http://www.nbclearn.com/science-of-golf
http://www.nbclearn.com/portal/site/learn/science-of-nhl-hockey
http://www.nbclearn.com/portal/site/learn/science-of-nfl-football
http://www.nbclearn.com/portal/site/learn/science-of-the-olympic-winter-games
http://www.nbclearn.com/portal/site/learn/science-of-the-summer-olympics
HOW STUFF WORKS
http://auto.howstuffworks.com/auto-racing/nascar/history/nascar-downforce1.htm
http://entertainment.howstuffworks.com/physics-of-baseball.htm
http://entertainment.howstuffworks.com/physics-of-football.htm