The swim was an enormous drop for Hayes, coming in 0.76 seconds under his previous best time, which was from the San Antonio Pro Swim Series just one week ago
McCarville, who primarily has been a fly/IM specialist, clocked a 2:16.13, completely blowing away her previous best of 2:23.58.
Karl entered the meet at just 27.09, dropping to 26.72 in prelims and finally a sub-26 outing in finals.
14-year-old Levenia Sim finished sixth overall in the 100 back, while 13-year-old Claire Weinstein was seventh in the 500 free.
Cavalier Aquatics teammates Thomas Heilman and Grey Davis both have four swims ranked in the top-25, while Levenia Sim is fourth overall in the 100 back.
16-year-old Aubree Brouwer smashed three-and-a-half seconds off her lifetime-best in the 200 breast to move into the top 20 in USA Swimming age group history.
NC State commit Aubree Brouwer posted the 22nd-fastest time for 15-16 girls in the 200 breast on night one of Winter Champs in Lee Summit, MO.
In our Weekly Wonders of Age Group Swimming series, we celebrate the swimmers of every age and experience level with a quick roundup of great swims.
Empire KC Swim Club hosted a one-day tri-meet that was highlighted by Tennessee commit Kate McCarville clocking two new best times.
At his first meet in 7 months, and in his 3rd swim of the day, Caleb Ellis of the Empire KC Swim Club had a breakthrough swim in the 100 fly.