i look at Tek much the same way i looked at Posey....
which is worse: overpaying by a few mil or risking an important piece to a championship squad?
if the Sox had not brought Tek back over a couple of mil and they missed the playoffs....ugh, bad news..
glad it looks like he is coming back.
I wouldn't exactly say they're the same. The catcher position in baseball is kind of like center and point guard in the NBA: it's hard to fill. I think that bears mentioning when looking at the dollars. Furthermore, like the center position, it's often harder to get big time offensive production guys there. Thus, while Varitek's numbers were poor last year, was the average catcher hitting .250 really that much better? That doesn't really apply to Posey, who played the 2/3.
Furthermore, the Sox, unlike the C's, don't have a salary cap to worry about. Even if this signing is bad (and I don't think it is), they can still go out and spend big next year if they want.
Finally, in general, I like this deal. It pained me to watch Tek bat last year. Despite that, I don't think he can truly quantify what he does for a pitching staff. You look at his .220 average last year. That's 93 hits in 423 ABs. A .250 average wouldn've been 106 hits in as many at bats, a measly 13 hits over the course of 131 games played, or 1 less hit every 10 games. I think he makes up for that 1 hit every 10 games with what he does with the pitchers on a daily basis. Furthermore, in a game of inches (and to an extent luck) like baseball, how much of a .250 vs. a .220 BA is talent and how much of it as luck? While I'll grant you that baseball players can sometimes control what part of the park they hit the ball too, they certainly can't control the difference between a groundball hit 3 feet to the right of the shortstop vs. 5 feet to the right of the shortstop.
Overall, I think this is a good deal. They didn't have anyone in the organization ready, so they would have had to overpay with prospects for someone who wasn't necessarily going to be great anyway. Now they have a year or two to figure out what to do with the future. And if Papi and Lowell bounce back, Varitek's offensive woes shouldn't hurt as badly as last year.