PECOTA's favorite among this cattle call is command-and-control lefty Scott Lewis (4.64 ERA), who pitched well in a four-start September stint. It's not nearly so keen on fellow southpaws Aaron Laffey (5.33) or Jeremy Sowers (5.16), both of whom have shuffled off to Triple-A Buffalo countless times in recent years, and it's downright pessimistic on yet another lefty, Zach Jackson (5.86).PECOTA takes on spring position battles, via ESPN Insider. This is straight PECOTA reportage, not independent analysis. Laffey's demotions to Triple-A are not countless; they could be counted with little difficulty, and without looking it up, it seems to me that only one of those demotions had anything to do with poor performance. Like Carmona entering 2007, Laffey entering 2009 is a clear case where PECOTA has all the stats but not all the information.