Ruiz batted with the bases loaded in the fifth inning after Towers relieved Mark Melancon. Towers threw an 0-2 pitch that appeared to hit Ruiz in the cheek.
Ruiz fell forward on his knees, holding his head. Trainer George Poulis and manager Cito Gaston rushed to Ruiz's side, and team physician Dr. Ron Taylor also tended to him.
After a few minutes, Ruiz stood up, walked off and left the game.