The Rockies demoted pitcher Wilton Lopez to the Triple-A Sky Sox on Wednesday, less than 24 hours after Colorado's disastrous blowout loss to the Chicago White Sox.

Josh Rutledge, an infielder, was called up in Lopez's place. He is active and available from the bench for Wednesday afternoon's series-deciding game at Coors Field.

"It's time for him to go iron things out and get out of the pressure and glare up here," Rockies manager Walt Weiss said of Lopez.

Lopez, a right-handed reliever, allowed six earned runs, eight hits and three home runs Tuesday while recording just two outs in the eighth inning.

"He needs to get to the point where he believes in his slider," Weiss said. "He's very durable, very versatile. He brings a lot of value."

Lopez signed a one-year, $2.2 million deal with the Rockies in January. He is expected to join the Sky Sox on Friday when they return to Colorado Springs from Round Rock, Texas.

"He has a track record we believe in," Weiss said.

Lopez arrived to the Colorado clubhouse Wednesday morning, then he was told of his demotion about an hour later.