Marcus Gentry of the Superior Stingray Swimming Club won five state titles and was second in another event at the 10-under state championship meet.
The meet was Feb. 22-23 in Springfield.
Gentry, 9, won the 100 freestyle (1:04.34), the 200 free (2:18.39), the 50 backstroke (32.74), the 50 butterfly (31.05) and the 100 fly (1:12.08). He was second in the 50 free (29.69).
Superior qualified 10 swimmers to the meet.
Gentry also swam on two relays with teammates Asa Frisbee, Antonio Orozco and Steven Peng that each finished fourth.