A handwritten sign hastily taped above the little corner of the Royals clubhouse where Sean O'Sullivan and three relievers have their locker stalls told the story: "Shut Out Wall." That's what it said, and that's what they did. O'Sullivan, making his first start of the year, combined with relievers Tim Collins, Jeremy Jeffress and Aaron Crow to blank the slumping Mariners 7-0 Saturday, continuing a surprising getaway that's vaulted the Royals into first place in the AL Central. "You've got to give credit to the rest of the guys in this locker room and the way they're playing the game," said O'Sullivan (1-1). It's fun to show up at the park right now." Alex Gordon had three hits, raising his league-leading total to 22, and drove in two runs and Mike Aviles had three RBIs as the Royals beat 2010 Cy Young winner Felix Hernandez and handed the Mariners their 11th loss in 13 games. Read more: http://scores.espn.go.com/mlb/recap?gameId=310416107&teams=seattle-mariners-vs-kansas-city-royals