Ivan Rodriguez Between the Capitals’ success, the Redskins’ woes and the Wizards’ near-invisibility, it’s easy to forget that the Nationals — or at least the team’s front office — are busy at this time of the year, too. Baseball’s winter meetings are in full swing this week, where the league’s general managers all get together to wheel and deal. This off-season, one of the Nats’ highest priorities was to find a reliable backup catcher,…