The Red Sox rely on reversion to the mean coming into the 2013 season. That is, having more players achieve closer to their 'normal' performance. The "Moneyball" approach looks to translate historical performance in key metrics, to oversimplify, OPS for offense and K/BB for pitching, into effective play.
Traditionalists argue that Moneyball overlooks what others would call baseball instinct. Sabermetricians could reply that your "lying eyes" see what they want.
I lack the inclination to review the entire team by plate appearances, but we can go through a couple, especially the "strength up the middle" dynamic. Among AL catchers with at least 300 plate appearances, Jarrod Saltalamacchia was eighth in OPS (.742) and tenth in WAR (1.2). The good news, if that matters, is that he was better than Jesus Montero.
In centerfield, Jacoby Ellsbury has been a model of inconsistency. Injury-plagued, the Sox 'golden boy' has had an AL MVP runnerup campaign and then 2012.
Ellsbury, who received a one million dollar raise to nine million dollars, was twelfth in the AL in OPS, and last in Wins Above Replacement (WAR).
If Ellsbury suffers much work absence this season, the Sox have an "insurance policy" in the Flyin' Hawaiian Shane Victorino.
Victorino comes in with a thirteen million dollar price tag. The only problem is that Victorino is not much of a difference from Ellsbury. Even with the anticipated stolen bases, the runs created story isn't likely to be much different.
For their careers, both have averaged less than three Wins Above Replacement for what passes as full seasons, although Ellsbury's .791 career OPS is a bit higher than Victorino's .770.
Victorino has won three Gold Gloves and Ellsbury one.
Sox fans are familiar with player inconsistency, injury, and disappointment. Who doesn't remember George "The Boomer" Scott hitting .303 in 1967 and .171 in 1968. Or Dwight Evans, who hit under .250 five times and over .280 seven times? And we remember Jack Clark's cup of coffee on the way out the door and Nick Esasky wiped out by vertigo.
So how will the Red Sox actually do? The Sox have more question marks than Frank Gorshin's Riddler in Batman. Will David Ortiz's heel recover and will Mike Napoli's heel hold up? Is Johnny Gomes more than a platoon player? Will the Red Sox rotation of Jon Lester, Clay Buchholz, John Lackey, Ryan Dempster, and Felix Doubront be a rotisserie success or get fried?
Here are some projections.
Baseballguru (80-82) third.
Red Sox individual (ZIPS)
Athlon Sports Dismal
Bleacher Report Benched
The computer simulation season projections are still pretty thin. And what does it matter?
With teams still under construction and health (and PED issues) still up in the air, it's too early to take strong stances on performance.