Highlights from the Nationals’ media availability this week… but mostly last night, but also other stuff, and more and stuff… September Call-Ups: September call-ups ain’t what they used to be. Gone are the days of multiple call-ups which blew up rosters and led to interminably long games with constant substitutions late slowing things to a crawl … at least when your team wasn’t in contention … but also if they were still fighting for something. Rosters expand from 26 to 28 players on September 1st, and as Nats’ GM Mike Rizzo told 106.7 the FAN in D.C.’s Sports Junkies on…