Claesson began 2016 by going undefeated in her events while helping the Seahawks split a pair of dual meets over the weekend. In Wagner's win over Rhode Island, Claesson took first in the 200 breaststroke (2:23.81), and set a new pool record in the 100 breaststroke with a time of 1:06.04. The junior continued her efforts on Sunday as she was the lone Seahawk to earn an individual win in a setback to Bucknell. The California native claimed victories in the 100 (1:05.38) and 200 breaststroke (2:23.44).