Ratings
2013-04-21: Calvin College Open(USA)
| MATHESON Joseph | 01-63 | ENTINGH Eric |
| DREXEL John | 15-49 | MATHESON Joseph |
| MATHESON Joseph | 37-27 | ZYLSTRA Isaac |
| ROCKWELL David | 43-21 | MATHESON Joseph |
| MATHESON Joseph | 05-59 | WIENCEK Tom |