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5/21/2014 12:59 A.M. ET

Pena happy to be back in Kansas City

KANSAS CITY -- It's been about a dozen years since Francisco Pena was frolicking around the Royals' clubhouse. In those days, he was with his father, Tony Pena, who was managing the Royals.

"I think I was around 12, 13-years-old and it was a great experience being here with my dad when he was here," Pena, 24, said on Tuesday after being called up from Triple-A Omaha.

Things have changed since then, of course.

"I remember it used to be different. It's very modern, real nice and it's real nice to be part of it as a player now," he said.

Although Pena spent seven years in the New York Mets' Minor League system, he never made it to the Major Leagues, but he made his big league debut in Tuesday night's 7-6 loss to the White Sox.

He entered the game in the ninth inning after catcher Brett Hayes was taken out for a pinch-hitter. He caught Casey Coleman's scoreless ninth inning and, to top it off, threw out Adam Eaton trying to steal with a strong peg to second baseman Pedro Ciriaco. But he admitted he was nervous.

"At the beginning, I thought I was going to puke," Pena said. "But I took a deep breath and said, 'OK, you're here. Just have fun like mom and dad always said.' To be honest, I don't have words to describe it. It was a real nice moment and we were close in the game so I just concentrated on trying to win the ballgame."

Telling the rest of the family about his promotion on Monday night was a joy as well.

His brother, Tony Pena Jr. or "T.J.," was a shortstop with the Royals from 2007-09 while Francisco, or "Frankie," was just starting his pro career as a catcher. T.J. turned to pitching and now has a 2.04 ERA in 17 games as a reliever for the Laguna Vaqueros in the Mexican League.

"I enjoyed seeing him play here, and I hope now he enjoys seeing me play here. He's still pitching in Mexico and doing real well. He almost cried yesterday when I told him the news," Frankie said.

"My heart started going real fast. Brian Poldberg, our manager, called me. And the first thing I did was call my dad and then called my mom and none of them believed me. They thought I was joking. It's a great, great feeling and there are no words to describe it."

Pena was a chunky youngster when his dad, now a Yankees bench coach, was managing the Royals. He occasionally took batting practice at Kauffman Stadium.

"I used to hit BP here and hang around, and guys used to tie me up," he recalled. "Mike Sweeney used to be here, a real, real nice guy, and I was always running around, always in the kitchen eating."

For Omaha, he's already matched his one-year high in home runs with nine.

"I'm trying to get a good pitch, just working hard and working on my body, trying to stay healthy and trying to do every little thing that they asked me to do," he said. "And just try to hustle every day."

His Omaha teammates kidded him about being a natural for the Pacific Coast League.

"Now, the guys call me PCL Pena but it's fun. I'm not trying to hit them, I'm just putting a good swing on the ball and they're just going out," Pena said.

He'd rather be known for what he does in the American League, of course. It's been a long time coming.

"I thought it was going to come and it did come," Pena said. "It's a dream come true and I'm here and I can hopefully help the team."

Valencia gets increased time at Moustakas' expense

KANSAS CITY -- Third baseman Mike Moustakas hasn't been able to get his bat going, so Danny Valencia is getting an expanded role.

For the first time since Royals manager Ned Yost began platooning with the left-handed Moustakas and the right-handed Valencia, he deviated from the system. Although the White Sox started a right-hander, Andre Rienzo, on Tuesday night, Valencia started at third base instead of Moustakas.

"Right now, I wanted to get Danny some at-bats because we do have lefties coming up the next two days. Danny's been swinging the bat OK and I wanted to get him in there, get some at-bats, let him play a couple days in a row and see what develops," Yost said.

The first trial turned out well. Valencia banged a two-run double and singled in three at-bats against Rienzo and later drew a walk.

"I was fortunate enough to get some good pitches and I felt pretty solid in there today. The only thing is we came up short and that's the worst part about it," Valencia said after the 7-6 loss.

Yost was satisfied.

 "I thought he played a great game -- the big two-run double to get us going was big. He ended up getting another hit," he said. "I thought he played well, offensively and defensively."

Moustakas got into the game as a pinch-hitter in the eighth inning with two runners on base but popped out.

Last Wednesday, the struggling Moustakas ripped off two doubles and had a three-run double in a 3-2 victory over the Rockies. He also flied out deep to right.

"He had a big day the other day. I thought he was going to get it going," Yost said.

It didn't happen. In four games since then, Moustakas was 1-for-12. His average, never over .162, is at .153, although he does have four home runs and 17 RBIs.

Valencia went into Tuesday night's game against the White Sox with a .283 average in 14 games with one homer and four RBIs. He had 46 at-bats compared to Moustakas' 124.

So, Valencia apparently will be at third base for at least three straight games.

"I'm definitely happy about it," Valencia said. "It feels good to be in there. Obviously, everybody wants to play. And when you get your chance, you're excited and you try to make the most of it, really.

"The more at-bats, the better. Baseball's one of those games where you want to be in there as much as possible to feel like you're in a pretty good rhythm."

Valencia hasn't played on an everyday basis since 2011 with the Twins. He's since had short stays with the Red Sox and Orioles.

Asked if he communicated his lineup plans directly to players, Yost said: "These are all big boys. You can look at your performance and that ought to communicate what's going on. You can read into all you want. I wanted to give Danny some at-bats tonight with the two lefties coming up, see how he does. He hasn't had the opportunity to play much."

Dick Kaegel is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.