Red Sox star Justin Turner just got drilled in the face by a pitch during a spring training game ... and the blow was so violent, it left him oozing blood at home plate.
The scary incident happened during Boston's exhibition tilt with the Tigers ... when Turner came up to bat with two runners on base in the bottom of the second inning.
Detroit right-hander Matt Manning threw a ball up and in ... and Turner couldn't get out of the way -- and it caught him flush in his face.