A couple of champs mixing up. Annapolis, Md., April 15. The Navy Junior Boxing Championships for sons of Naval Officers stationed at the Naval Academy here got underway today with much action and little in the way of bloodshed. This 20th annual tournament was entered by more than 100 lads ranging from 3 to 14 years. Here's Wesley Hogan, 6, and Donald Fravel, 6, a pair of swinging 50-bounders exchanging blows