Ronald Dalmacio Slashes Boy’s 11-12 50-M Back NAG Record

While swimming at the 2016 California June Age Group Championships Ronald Dalmacio of Rose Bowl Aquatics cranked out a 27.88 50-meter backstroke to take down the existing 11-12 50 Back National Age Group record by more than half a second.

The former record was set at a 28.41 by Kevin Kyi, a monumental swim at the time as it broke the seven-year-old record of 28.49 set by Seth Beer.

Dalmacio holds multiple other NAG records:

  • 10 and under 50-M back (30.95)
  • 10 and under 100-M back (1:07.40)
  • 10 and under 50-Y back (26.91)
  • 10 and under 100-Y back (58.62)
  • 10 and under 100-Y IM (1:01.21)

Dalmacio’s time today was swum as part of a time trial after he posted a prelims time of 29.28 and a finals time of 28.42.




  1. avatar

    Just to clarify a bit – His time coming into the meet was 29.28, his timed final race swim was 28.42, and then broke the record on a 200 Medley Relay later in the session.

    • avatar

      Of note, Seth Beer just named ACC baseball mvp playing at Clemson. What an athlete!

Author: Taylor Brien

Taylor Brien is the Assistant Operations Manager and a staff writer at Swimming World. A native of Bettendorf, IA and a 2015 graduate of Illinois College, she has covered a variety of events since joining the SW team in 2015, including the NCAA Championships, World Championships, Olympic Trials, and 2016 Rio Olympic Games.

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