Boston Red Sox MVP winners
10 players
10 players won the MVP in a season with the Boston Red Sox. Ted Williams did it the most, twice (1946, 1949). On a roster now: Mookie Betts.
A winner counts for a club when he played for it in the season he won, the Immaculate Grid's rule. Award lists from Wikipedia. Every season since 1876 is on file. A season split between two clubs is filed as one combined line and counts for neither.