Rockies accused of using 'juiced' balls

DENVER — Umpires are keeping a close eye on game balls at Coors Field after the San Francisco Giants expressed concern to the commissioner's office that the Colorado Rockies might be using "juiced" balls when they're batting.

Major League Baseball spokesman Pat Courtney confirms that umpires were instructed to begin monitoring game balls Saturday night during the Giants-Rockies game. Courtney says the Giants raised concern about the Rockies using balls Friday night that weren't properly stored in the humidor at Coors Field.

The story was first reported by the San Francisco Chronicle, which said the Giants filed a complaint with MLB regarding the handling of the baseballs after their 2-1 victory over Colorado on Friday.