KANSAS CITY -- Winning games by nine runs usually would be considered a highly positive evening for Ozzie Guillen. But it was a Friday night of mixed emotions for the White Sox manager, despite his team's 11-2 shellacking of the Royals at Kauffman Stadium.

"It's a great day because we won but not a fun day for me," a somewhat somber Guillen said after the victory.

Guillen always has talked about the least favorite part of his job centering on telling players their services no longer will be needed by the White Sox. That news was delivered by Guillen to veteran backup catcher Corky Miller on Friday night.

Miller officially will be designated for assignment prior to Saturday's contest, with the White Sox announcing on Friday that they had acquired catcher Ramon Castro and cash from the Mets in exchange for right-handed reliever Lance Broadway. Castro, 33, is hitting .253 with three home runs and 13 RBIs in 26 games this season, but the more telling statistic is that Castro has thrown out six of 14 attempted basestealers.

For his career, Castro has a 27.7 percent success rate. White Sox pitchers enjoyed throwing to Miller, but he was just 1-for-9 on stolen base attempts against him and hit .205 with five RBIs.

While Guillen had nothing but rave reviews for Miller's work, Miller seemed more than a bit stunned by the sudden move.

"You learn never to get surprised in this game, but something like that to happen, it's disappointing," Miller said.

"Corky Miller was outstanding from the first day of Spring Training to today. His teammates love him. I love him," Guillen said. "Corky did a tremendous job for us and I was very happy with him, but we made a decision that we had to get better there."

The best year for Castro, who is earning $2.5 million in the second year of a $4.6 million deal, came in 2007, when he hit .285 with 11 home runs and 31 RBIs for the Mets. Castro played under Guillen during the 2002 and 2003 seasons, when Guillen served as third-base coach for the Florida Marlins. The two won a World Series title together in 2003.

"He's a pretty good ballplayer," said Guillen of Castro. "We had the opportunity to get this kid and the opportunity to get better in that department."

This move could be a plus for Broadway, the team's top pick in the 2005 First-Year Player Draft, who had basically been relegated to long relief. In fact, Broadway knew something was brewing late in Friday's blowout when he didn't warm up or get into the game to work an inning or two.

Broadway then received a message from Wes Whisler, his roommate when the two played together at Triple-A Charlotte, saying that Whisler was getting his first call to the Majors. The southpaw will replace Broadway, 25, prior to Saturday's game.

"I thought I must be getting sent down. So, I was pretty surprised," said Broadway, who was 0-1 with a 5.06 ERA in eight relief appearances this season, of his reaction to the trade. "It has been great here.

"They have done so much for me and my family. They've given me a ton of opportunities. I had a wonderful time here. That's why I didn't know when I got traded how I'd feel because I really like it here."

As of Friday night, Broadway wasn't sure what his role would be with the Mets. He said that his cell phone was dead, so he was unable to talk with anyone in the organization.

But the White Sox feel as if they improved their support system for A.J. Pierzynski behind the plate and gave Broadway a chance to shine somewhere else. If Guillen had his way, though, Miller wouldn't have been caught in the trade crossfire.

"This has been great. The guys are great," Miller said. "You go back and think about the things you could do better. I guess I could have hit .300.

"Would that have made a difference? I don't know. It's all up in the air. You like to have some kind of reason for it. Kenny [Williams, White Sox general manager] and them have their own reason for it and hopefully it works out for them."