According to a baseball source, the one-year, $5 million deal with the Red Sox and Mike Napoli includes the following incentives that could increase the value of the deal to $13 million:

Active roster bonuses

$500,000 each for 30, 60, 90, 120 days on the active roster

Plate appearance bonuses

$500,000 each for 300, 325, 350, 375 plate appearances

$1 million each for 400, 475, 550, 625 plate appearances

Catch-all bonus

If Napoli is active for a minimum of 165 days in 2013, he will get the full $8 million in incentives for a total of $13 million