Jorge Polanco hit a walk-off RBI single in the ninth inning and the Seattle Mariners beat the Cleveland Guardians 4-3 on Saturday night. With one out and the bases loaded, Polanco smacked a single up the middle off Guardians closer Emmanuel Clase (4-1), who blew a save opportunity earlier in the frame when he threw a wild pitch that allowed Dylan Moore to score and tie the game at 3-all.