SEATTLE -- Members of the Dallas Cowboys will participate in a home run derby Wednesday at the Ballpark in Arlington to raise money for Big Brothers Big Sisters organization.

Former Cowboys quarterback Troy Aikman will emcee the event, which will be attended by members of the Big Brothers Big Sisters organization. It is not open to the public.

Reliant will sponsor the event and donate $500 for each home run. Eleven bull's-eye targets will be set up for players to hit and earn additional bonus donation money. Head coach Jason Garrett will participate along with Miles Austin, Jason Witten, DeMarco Murray, Dez Bryant, John Phillips, Doug Free, Sean Lee and Kevin Ogletree. Former Rangers pitcher Tim Crabtree will pitch.

Kirkman undergoing treatment for skin cancer

SEATTLE -- Michael Kirkman, who is pitching for Triple-A Round Rock, is undergoing treatment for skin cancer, the Rangers announced on Monday.

According to a statement, Kirkman, 25, was diagnosed during an examination that took place in Gainesville, Fla., in January. He is undergoing regular treatment in Round Rock and being monitored by doctors in Florida and Texas.

Kirkman is being allowed to participate in full baseball activities while undergoing treatment, and the prognosis is for a full recovery.

Kirkman, who is scheduled to pitch on Tuesday against Sacramento, has made six starts and five relief appearances for the Express and is 2-1 with a 6.68 ERA. He made 29 relief appearances for the Rangers over the previous two seasons.

Tateyama recalled in return to Rangers' bullpen

SEATTLE -- Yoshinori Tateyama is back in the big leagues.

The Rangers called up Tateyama on Monday from Triple-A Round Rock after placing pitcher Neftali Feliz on the disabled list with a sprained right elbow. Tateyama goes into the bullpen while Scott Feldman will take Feliz's spot in the rotation.

Tateyama, who began the season on the disabled list with tightness in his lower back, pitched in 12 games for Round Rock and was 1-0 with a 0.54 ERA. In 16 2/3 innings, he allowed 12 hits and four walks while striking out 14.

He was 2-0 with a 4.50 ERA in 39 games for the Rangers last season.

"I love Tateyama," Rangers manager Ron Washington said. "He's got a lot of heart and a lot of guts. He gives you what he's got and never complains about nothing. He'll take the ball."

Tateyama said he has not had any trouble lately with the back problems that kept him from making the team out of Spring Training.

"I had a good time in Triple-A," Tateyama said. "I was not good at the end of Spring Training. My mechanics weren't perfect, but I was able to adjust to it."

Rangers general manager Jon Daniels said the club also considered calling up right-hander Tanner Scheppers, who is ranked by MLB.com as the Rangers' No. 10 prospect. But he hasn't been quite as consistent as Tateyama, going 0-2 with a 4.12 ERA.

"In some ways he's the home run," Daniels said. "When I was down there, I saw one of his best outings. It's a matter of his consistency getting better. When he's consistently commanding the ball down in the zone, he can really help us."

Run of righties gets Moreland back in lineup

SEATTLE -- First baseman Mitch Moreland was back in the Rangers' lineup on Monday after having to sit out during their three-game series with the Astros in Houston. There was no designated hitter used in the National League park so Michael Young started all three games at first base.

But Moreland should get plenty of playing time this week. The Rangers are scheduled to face three right-handed starters against the Mariners and against the Blue Jays over the weekend in Arlington. The Blue Jays have one left-handed starter in Ricky Romero, who is scheduled to pitch on Wednesday against the Rays. The Blue Jays are lined up to pitch right-handers Brandon Morrow, Henderson Alvarez and Kyle Drabek against the Rangers.

Moreland was 0-for-2 as a pinch-hitter in Houston but is still 6-for-16 with three home runs and eight RBIs in his last seven games and hitting .362 in his last 20 games. Moreland said he does not expect his time off in Houston to affect him.

"I'm going to go out there, stick to my approach, see pitches, try to get something up and hit it hard," Moreland said. "You're going to have ups and downs, you just have to continue to put together good at-bats."

The Rangers may not face a left-hander again until next Tuesday in Arlington when Jason Vargas is scheduled to pitch for the Mariners. Their rotation has Kevin Millwood pitching in the first game of the three-game series followed by Vargas and Blake Beavan.

Worth noting

• TV broadcaster Dave Barnett was sick on Monday and unable to work. Steve Busby switched from radio to replace him on the television broadcasts.

• Class A Advanced Myrtle Beach pitcher Cody Buckel has been named the Carolina League's Pitcher of the Week. It's the third time for Buckel, who is 3-1 with a Carolina League-leading 1.14 ERA and 59 strikeouts.

• Colby Lewis had two hits and two RBIs on Sunday in Houston. It's the second time in his career he has done that and he is the only American League pitcher to have two such games in Interleague Play.