Ryan Hoffer of Chaparral High School in Arizona has broken the National Age Group Record in prelims of the Arizona High School Division I State Championship on Friday.

The 15-year old freshman was an unbelievable 19.55 in prelims, which breaks Caeleb Dressel’s 19.82 set just a year ago in Florida.

Hoffer also split a 20.8 on the 200 medley relay and took the top seed in the 100 fly with a 48.18.

He trains in club for the Scottsdale Aquatic Club, and despite just turning 15 at the end of the summer, blew away Dressel’s record. That’s really quite scary, given how impressive Dressel’s 2012-2013 season was at 16 years old.

Hoffer’s previous best of 20.02 was done in breaking the 13-14 National Age Group Record earlier this year. He now holds the individual marks in the 13-14 50 and 100 yard freestyles, the 15-16 50 yard freestyle, plus as a part of Scottsdale’s 200 and 400 free relays in the 13-14 group.

Update: Hoffer then ledd off Chaparral’s 400 free relay with a 43.87. That was about six-tenths shy of Dressel’s record.

Finals for the meet will be held on Saturday.