Dathan Ritzenhein's 6th-place finish in the World Championships 10K earlier this month signaled the Olympic marathoner still has a lot to give on the track... but an American Record at 5K?! Tonight in Zurich, the Colorado alum knocked off Bob Kennedy's standard with a 12:56.27 clocking that found even Ritz himself a little surprised. Click player (above right) for video of Ritz's post-race reaction. August 28, 2009