Sosa was very effective when he was not overused. As a starter he was doing fine up to the eight shutout innings against Detroit, where he threw 116 pitches (his second highest amount was 104). After that he struggled. His first appearance in the pen came on July 31; between then and August 29 he threw 20 relief innings, boasting a 2.70 ERA in that stretch. 20 innings in a month would translate into 120 innings over the season; by contrast, nobody threw more relief innings overall in 2007 than Heath Bell's 93. In other words, I don't care if you've been starting, 20 relief innings in a month is a LOT, and they took their toll. His consistency vanished in September, and despite a few good outings his ERA for the month was 6.57. So if you acknowledge his limits, I think he can be a big asset for the club. The catch is, the Mets need a dependable sixth starter, AND they need a dependable innings-eater supporting Wagner and Heilman in the pen. Right now Sosa is the best option for both, but they only have one of him. Maybe Sanchez can give us 80+ innings out of the pen, but who's counting on that? Or, do you leave Sosa in the pen and hope that subjecting one of Pelfrey/Mulvey Humber to the New York-New Orleans shuffle doesn't have any residual effects?