Tennessee freshman David Heron finished 12th in a close field Thursday at the FINA Marathon World Cup event at Lac St. Jean in Canada.
Heron finished the 10K open water race in 1 hour, 59 minutes, 7.2 seconds.
Fifteen of the 26 competitors swam the course in under two hours. Andreas Waschburger of Germany won in 1:56.44.9.
Heron will return to pool competition in two weeks with the Phillips 66 National Championships in Irvine, Calif.
He has spent most of the summer excelling in open water races. He placed fifth in both he 5K and 10K at the USA Swimming Open Water Championships in June.