Weller captured first in a pair of individual events—the 200-yard freestyle and the 200-yard backstroke at the 2026 Liberty League Swimming & Diving Championships. He also was third in the 100-yard backstroke. He also helped the Engineers earn third in the 400 medley relay and 200 freestyle relays. In the 200 backstroke, it was the third time Weller won the event and he posted an NCAA B-cut time for the second straight year (1:48.30). He also recorded an NCAA B-cut time in the 200 freestyle at 1:39.33. He was named Liberty League Co-Swimmer of the Meet at the conclusion of the championship.