The U.S. Open Wrestling Championships held at The Expo in Las Vegas, Nevada concluded with Sunday’s Freestyle finals in the U17 and U20 Divisions. Competition began last Wednesday.  Our focus is on the high school age groups and on Freestyle because it most closely resembles folkstyle, which is the primary style in the United States. This report will be on the U17 Freestylers. Three stood out as shining stars, New Jersey’s JoJo Burke (60 kilograms), Georgia’s Ariah Mills (51 kg), and California's Arseni Kikiniou (65 kg).  Burke Blew Up in Vegas Burke, didn’t represent a club, just his state where the last time he competed him he was finishing as a state runner-up for St. Joseph Regional at 120 pounds to Cam Sontz (Delbarton). When we noticed the sophomore up at 60 kilograms (roughly 132 pounds), we slotted him in at No. 22 in our most recent rankings update. Burke had a breakout performance in Vegas. In the round of 16 he faced off with Minnesota’s Fargo Champ, No.…