Wheaton, Ill. – The Thunder wrestling program will host teams from around the country this weekend when action begins at the 81st Pete Willson-Wheaton Invitational. The Pete Willson-Wheaton Invitational is the oldest and largest small-college wrestling tournament in the country, dating back to the original Wheaton Invitational in 1938. This year 33 teams from 11 states will be competing.