ARLINGTON -- More on C.J. Wilson's complete-game, 4-1 victory over the Royals on Thursday and his performance through six games:

* Wilson is only the second Rangers pitcher in the last 14 years to throw a complete game at the Ballpark in Arlington without giving up an extra-base hit. Ryan Drese did so on June 27, 2004. It happened six times between 1994-96.

* Wilson's 41 2/3 innings is the most by an American League pitcher who has not allowed a home run. Wilson, Seattle's Doug Fister and Minnesota's Francisco Liriano are the only qualifying American League pitchers who have not allowed a triple or a home run.

* Wilson's 1.51 ERA is the third lowest for a Rangers pitcher after 30 games and a minimum of 40 innings. Rick Honeycutt had a 1.38 ERA after 30 games in 1983 and Kenny Rogers had a 1.42 ERA in 1995.

Guerrero leads in park-specific average

ARLINGTON -- Vladimir Guerrero's work at the Ballpark in Arlington is officially the best at any ballpark in the Major Leagues.

Guerrero went into Saturday's game against the Royals with a .410 batting average at the Ballpark. That's the highest average of any player at any of the current Major League parks, with a minimum of 100 at-bats at the facility.

Albert Pujols is hitting .400 at Kauffman Stadium, followed by Victor Martinez with a .398 average at Tropicana Field, Adam Kennedy with a .395 average at Fenway Park and Adrian Beltre with a .394 average at Coors Field.

Guerrero's .410 average is also the highest average ever at the Ballpark for a player with at least 50 games played there. Next is Tim Salmon with a .378 average. Guerrero's .727 slugging percentage is also the highest ever at the Ballpark while his .475 on-base percentage is the second highest. Salmon had a .481 on-base percentage.

Guerrero, going into Saturday's game, is hitting .464 at home this season, the highest home batting average in the American League.

Rangers use pink bats to fight breast cancer

ARLINGTON -- The Rangers are getting ready to swing the pink bats again.

Rangers hitters will be swinging the pink bats on Sunday as part of Major League Baseball's celebration of Mother's Day and the Going to Bat Against Breast Cancer Initiative.

The pink bats have been a part of Mother's Day in the Major Leagues for the past five years.

"It's fun," second baseman Ian Kinsler said. "Honestly it's Mother's Day and it's cool that everybody is showing their appreciation for Mother's Day."

Many players are also wearing pink wristbands, and the symbolic pink ribbon for breast cancer awareness will be displayed on the uniforms.

Melanie Parsons, a teacher at Garland High School who has been through three surgeries in her fight against breast cancer, will serve as the Rangers Honorary Batgirl. She plans to be at Sunday's Mother's Day game against Kansas City at Rangers Ballpark in Arlington with her mother, Sherry Murray, and daughter, Carol Jane Hensleigh.

Mathis kept from mound by great starts

ARLINGTON -- Doug Mathis, the Rangers' primary long reliever, was one of the busiest relievers in April. His 13 innings in relief were the eighth most by an American League reliever for that month.

But, going into Saturday's game, Mathis has not yet pitched in May. His last outing was April 29 against the White Sox.

"That's the way it is sometimes," Mathis said. "You want to get out there like everybody else, but when the starters are going 6-7 innings or a complete game [on Friday], there is nothing you can do about it. You just stay positive and approach every day like I'm going to pitch. You can't get frustrated. That's the way it goes."

Rangers starters went into Saturday's game averaging seven innings per start over their last eight games. Only once in those eight games did they go less than six innings. That was Matt Harrison on Thursday night, when he lasted just five innings.

Rangers starters have also thrown at least five innings in 13 consecutive starts. Going into Saturday's game, the Rangers rotation ERA of 3.64 was the third lowest in the league behind the Blue Jays and the Yankees.

Worth noting

Michael Young on the Rangers being in first place: "I like where we're at right now but the biggest positive is we're not focused on the standings. Last year we were pretty excited to be in first place for awhile. This team is focused on getting better. We realize to win the division we have to get better."... Infielder Joaquin Arias, on the disabled list with a strained lower back, began his medical rehabilitation assignment at Double-A Frisco on Saturday. ... Nelson Cruz (strained right hamstring) is expected to join him on Monday there. ... Minor League pitcher Beau Jones has been promoted to Double-A Frisco.