Evaluating MLB Signings, Part 2: Madness

Last time out, we asked how good the Napoli and Victorino signings were for the Boston Red Sox. Using J.C. Bradbury's method, we established that we need to do the following:
1. Figure out how much a win is worth,
2. Figure out how much an individual player contributed to his team's wins, and
3. Convert that number of wins into a dollar value.

Evaluating MLB Signings, Part 1: Methods

After their 2012 season went down in flames, the Boston Red Sox were active during the recent winter meetings, signing 31-year-old first baseman/catcher Mike Napoli to a 3-year, $39 million contract, and 32-year-old outfielder Shane Victorino to a 3-year, $37.5 million contract. The moves were modest when compared to past offseasons, but the question remains: will the Sox get value from their new acquisitions?