Ratings
2013-04-21: Calvin College Open(USA)
| DREXEL John | 19-45 | ZYLSTRA Isaac |
| ZYLSTRA Isaac | 26-38 | WIENCEK Tom |
| MATHESON Joseph | 37-27 | ZYLSTRA Isaac |
| ZYLSTRA Isaac | 19-45 | ENTINGH Eric |
| ZYLSTRA Isaac | 13-51 | ROCKWELL David |