If they both came up today they wouldn't technically be rookies but I would consider them so for the point I am making. It puts excessive strain on a staff to have two guys without the innings built up in the same rotation to start the year. It is not about performance per se, but consistent ability to go 5-6 innings for 30+ starts, 180+ innings. That is really hard to do. Keep May in AAA, Pelfrey in bullpen, and Berrios close to ready in AA, and you are talking about legitimate quality depth to start the season. Do that, add a bat or two, have a prospect or two emerge and you are on to something.