Jim Rice. He was inducted into the Baseball Hall of Fame and his number got retired by the Red Sox on Tuesday.
Here is a link to a website that has the history of "which" number were worn for the Red Sox as early as 1931.
Carl Yastrzemski wore #8 for the Boston Red Sox.
Ted Williams wore the number 9 for the Boston Red Sox.
no of course not
Luis Aparicio wore #11 with the Boston Red Sox.
Tony Perez wore #5 for the Boston Red Sox.
12 Hall of Famers were Boston Red Sox