Mr. Ritzenhein was tested 17 times in the first 9 months of 2012.
The next most tested T&F athletes are as follows
2. Carmelita Jeter - 15 times
3. Abdi Abdirahman - 12 times
3. Bernard Lagat - 12 times
3. Galen Rupp - 12 times
4. Shalane Flanagan - 11 times
4. Kara Goucher - 11 times
4. Leo Manzano - 11 times
The most tested athlete of any sport were two triathletes who underwent 18 tests.