Yes, Gawain Jones , who is English, played in a couple of USCF tournaments back in the 90's, when he was under 10 years old. He got a provisional rating of 1625.
He didn't play in another USCF tournament for 20 years, one of the Millionaire Chess events. He did much better, scoring, 6/7 in the Open section and raising his rating to 2070.
When they say- once rated, always rated- they weren't kidding.
http://www.uschess.org/msa/MbrDtlMain.php?12662715