David Ortiz has a message for all of the Yankees' fans blaming Aaron Boone for their disappointing season -- STOP IT.

TMZ Sports got the Boston Red Sox legend out in Beverly Hills this week to talk about his old rival's team ... and he made it clear, Boone is not to blame for New York's early playoff exit this year.

"Managers don't play, man," Ortiz said. "Managers just make moves."