It's true the Red Sox need to start diversifying more. Over 20 years ago, Theo Epstein could see they couldn't possibly win with too many Dominicans -- like Martinez, Ortiz and Ramirez -- so he looked to the Far East and brought in Dave Roberts, who is half Japanese, and Kevin Millar, who was actually going to Japan, but turned his plane around.
Then in '07 Theo signed Matsusaka and Okajima, who are both literally Japanese, and the Sox won another ring.
Breslow and Bailey were both relievers on Boston's '13 champs, but they had mound time diminished by the presence of Japanese set-up man Tazawa and closer Uehara... so maybe the current braintrust views too much diversity as bittersweet.
It's not like the Red Sox have a history of racism tainting their place in the standings. Sure, they were the last MLB team to allow an African American player to wear their red socks, but it only took them 20 years after Jackie Robinson broke the color barrier to finally recruit a multi-cultural roster good enough to win the pennant.
That was in 1967, when the front office looked at the roster and saw way too many players with last names ending in vowels -- Yastrzemski, Petrocelli, Conigliaro, Stange, Santiago, Lyle -- and balanced it out by putting as many as six black players on the field in Scott, Foy, Smith, Tartabull, Howard and Wyatt. Those guys took them to Game Seven of the World Series.