In spite of this, I still like the signing.
Seriously though, while I think this signing makes most sense if Napoli is going to play 1B nearly all the time, it's interesting that of the six catchers Lackey has thrown at least 100 innings to in his career--including two of the Molina brothers, as well as Mathis, Salty and Victor--he has the lowest OPS allowed when throwing to Napoli: .693.
Wouldn't surprise me if Napoli becomes Lackey's personal catcher, getting him (hopefully) 30 starts behind the plate. - Hopefully meaning Lackey gets 30 decent starts.
I'm meh about the deal. It could have been a whole lot worse. But it does fill a big hole in the lineup and hopefully he does end up adapting well to Fenway. It's good the years are relatively short and the AAV isn't too bad. Can he be a 3-4 win player each year of his contract? That would be worth it.
Napoli's significant injury history, because it has to be a concern the guy has had 500 PAs in the majors exactly once and that was 510.
15 day DL stints: July 2007 (16 days, high ankle sprain), July-Sept 2007 - 10 days after the last stint (35 days, strained right hamstring), July-August 2008 (33 days, shoulder inflammation), June-July 2011 (22 days, oblique strain), August-Sept 2012 (36 days, quad strain).
Other significant notes: 2008-9 offseason (shoulder debridement)
Info is courtesy of Baseball Prospectus player cards.
It's not a great history, but not Lowrie-esque either.