Here's my initial thoughts on the trade that brings Jake Peavy to Boston and sends Jose Iglesias to the Tigers (via the White Sox).
At first glance this trade is a winner for all three teams involved. The Red Sox get a top of the line starter in Jake Peavy (the second best starter available after Cliff Lee); the White Sox get potential future all-star outfielder Avisail Garcia (and they shed Peavy's big salary), while the Tigers get perhaps the best defensive shortstop in the AL.
I do agree that the Red Sox sold high on Jose Iglesias but I would also say that the Tigers probably know exactly what they are getting in Iglesias. And they are pretty happy - Iglesias is just that good with his glove.
My first hope was that the Red Sox would land Cliff Lee but the Phillies asking price was just too high. Reportedly the Phillies wanted three top prospects plus the trading team to pick up all of Lee's massive contract. The Red Sox got Peavy for just one top prospect. How can you argue with that? I do find it ironic that the last time Peavy was on the trade market in 2009 he was viewed as the second best pitcher available after Roy Halladay and this time around he was second to Halladay's teammate Lee.
In regards to Iglesias - Boston has super shortstop prospect Xander Bogaerts waiting in the wings and it must be said that no matter how good Iglesias' glove-work was he would eventually be booed in Boston for not hitting. Iglesias is probably better off in Detroit.
EDIT: I meant to mention both Peavy's age (at 32 - he's basically 2-years older than Jon Lester and 2-years younger than John Lackey) and the effect he might have on the bullpen (Peavy is basically a quality start waiting to happen - helping the bullpen by lightening the load is a bonus that shouldn't be overlooked). Also here were two more good takes on the trade:
Ken Rosenthal and Richard Justice