The Wizards and Capitals are on summer vacation. The only Redskins news prominently features Ron Mexico and is not related to sports at all (well, human sports anyway). Despite these non-developments, this weekend has some intriguing aspects regarding actual Washington sports. >> Boxing comes to the District as the brothers Peterson square off in co-featured bouts at the D.C. Armory. Lamont and Anthony Peterson are a combined 42-0 with 25 knockouts between them. Anthony will…