Since I don't track such things, the names escape me, but it's certainly not unheard of for a guy to start a year in high A ball and finish it in the big leagues. I believe Carlos Villanueva came directly from Huntsville to the Brewers in 2006, pitched a scoreless inning in relief, then shutout the Reds for 6 innings in his first major league start. He later was sent down to AAA. The deal with Saenz is the Brewers needed an emergency starter, and nobody viable in AAA was on regular rest, so he got the call. I would think the pecking order right now for starter callups is Peralta, Fiers, Thornburg. The other guys starting at Nashville are merely placeholders other than Rogers who they want to get innings for but who's role down the road would seem to be relief. If Burgos dominates at AA for 10-12 starts, he could end the year in Nashville, and that would put a September callup in play. edit: In 2009, Daniel Hudson went 4-3 with a 3.40 ERA for Winston-Salem in the high A Carolina League, was bumped to Birmingham where he went 7-0 in 9 starts there with a 1.60 ERA, then moved to Charlotte, where he started 5 games going 2-0, with a 3.00 ERA, then was a September callup for the White Sox, appearing in 6 games (2 starts). So it happens though Brewers are generally not all that aggressive. Still, this is a year when potentially 3/5 of the rotation could be elsewhere next year. So if they are out of it down the stretch, lots of guys could get early looks.