INDIANAPOLIS – Who knew Cullen Jones was a butterflier?

The two-time Olympian, known mostly for his prowess in the sprint freestyle, set the meet record in the men’s 50m butterfly Wednesday with a time of 23.26. He is the top seed heading into tonight’s finals.

Here’s a look at some of the other highlights from this morning’s prelims:

Women’s 200m Freestyle

• Katie Ledecky (Bethesda, Md./Stanford Swimming) posted a 1:55.87 for the top seed, more than second faster than the next top finisher, Melanie Margalis (Clearwater, Fla./St. Petersburg Aquatics).
• Tonight’s top seeds include five Olympians, along with yesterday’s 100m free national champion, Mallory Comerford (Kalamazoo, Mich./University of Louisville).

Men’s 200m Freestyle

• Townley Haas (Richmond, Va./NOVA of Virginia) posted the fastest time of the morning with a 1:46.85. He was followed by University of Texas teammate Clark Smith (Denver, Colo./Longhorn Aquatics).
• Conor Dwyer (Winnetka, Ill./Trojan Swim Club) picked up the eighth seed for tonight’s final. He was the 2016 Olympic bronze medalist in this event. 

Women’s 200m Breaststroke

• Lily King (Evansville, Ind./Indiana University) notched a 2:24.68 for the top seed in tonight’s final, the only swimmer sub 2:25.00.
• At the 2016 Olympics, Katie Meili (Colleyville, Texas/New York Athletic Club) represented Team USA in the 100m breast. She’s picked up the third seed for tonight, and currently holds the fastest time in the country this year (2:23.18).
• 2012 Olympian Breeja Larson (Mesa, Ariz./New York Athletic Club) picked up the sixth seed. She won the national title in this event in 2013. Larson raced the 100m breast in Beijing.

Men’s 200m Breaststroke

• Andrew Wilson (Bethesda, Md./Longhorn Aquatics) posted a 2:08.64 to top the field.
• 2016 Olympic silver medalist Josh Prenot (Santa Maria, Calif./California Aquatics), along with Olympian Kevin Cordes (Naperville, Ill./Unattached) also return tonight as the third and fifth seeds, respectively. Prenot has one national title in this event, while Cordes has two.

Women’s 200m Backstroke

• Kathleen Baker (Winston-Salem, N.C./Team Elite) will be tonight’s top seed after swimming a personal record in 2:08.56. Baker was the 2016 Olympic silver medalist in the 100m back.
• 15-year-old Regan Smith (Lakeview, Minn./Riptide Aquatics) was the second-fastest performer this morning, posting a 2:08.95.

Men’s 200m Backstroke

• Sean Lehane (Naperville, Ill./University of Tennessee) posted a 1:57.07 for the fastest time of the morning.
• Olympic gold medalist Ryan Murphy (Jacksonville, Fla./California Aquatics) will be the third seed after posting a 1:57.35, followed by fellow 2016 Olympian Jacob Pebley (Covallis, Ore./California Aquatics) as the fourth seed with a 1:57.49.

Women’s 50m Butterfly

• 2016 Olympian Kelsi Worrell (Westamption, N.J./University of Louisville) claimed the top spot heading into finals with a time of 25.78.
• Kendyl Stewart (Carlsbad, Calif./North Coast Aquatics) is seeded fourth for tonight. She competed in this event at the 2015 FINA World Championships.

Men’s 50m Butterfly

• 33-year-old Cullen Jones (Irvington, Calif./Wolfpack Elite) broke the national championships record with a 23.26 to lead the field.
• In addition to Jones, three additional Olympians join the final, including Caeleb Dressel (Green Cove Springs, Fla./Bolles School Sharks), Tom Shields (Huntington Beach, Calif./California Aquatics) and Ryan Held (Springfield, Ill./NC State University).