Nurrenburg, Kelnhofer, Mungcal and Oliver Jarman placed 10th in the 200 free relay with a mark of 1:53.96.
The 400 free relay team of Kelnhofer, Eric Frey, Christopher Jarman and Oliver Jarman were 11th for OA with a time of 4:50.65.
The Bulldogs finished sixth in the team competition with 147 points. Host Columbus North claimed the sectional title with 479 points followed by Bloomington South (396) and Bloomington North (365). East Central was fourth with 235 points. Oldenburg Academy was 12th in the team competition with 40 points.