Kansas City's Zack Greinke pitched a complete game shutout against the White Sox on Monday night, improving his record to 6-0 and lowering his ERA to 0.40 this season. "He's the best in the league right now," White Sox manager Ozzie Guillen. Greinke already has three complete games and two shutouts this season, and is now just the third pitcher in baseball history to start a season 6-0 with an ERA of 0.40 or under. "Best pitching performance I've seen in a long time by a major league pitcher," Guillen said. "He's got great stuff."