Flores was the only athlete from Mexico in the regatta.
MEN'S ELITE EIGHT
OKC's United States Training Center crew, which included Olympian Tom Peszek, won the elite eight race with a time of a 12:50.55.
Tom Peszek and his partner, Silas Stafford, finished eighth in the London Olympics.
Finishing second was another OKC Training Center boat which featured three other Olympians, Robin Prendes, Will Newell and Will Daley.
Harvard won the men's collegiate eight in a time of 12:58.87 while boats from Oklahoma City University placed second and third.
It was the third time Harvard has won the Norick Cup at the regatta.
In the men's four, the University of Texas was the champ with a time of 15:44.64, while crews from OCU were second and third.
In the women's four, Stanford was the winner in a time of 16:12.99. Clemson was second and the University of Oklahoma was third.
Racing begins Sunday at 8 a.m. and concludes at noon on the Oklahoma River.