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04/08/11 7:14 PM ET

Webb encouraged after throwing session

BALTIMORE -- Rain and wind forced Brandon Webb to do his mound work inside on Friday at Camden Yards, but he was happy with the result. Webb threw 64 pitches and said he was much happier with his work than he was after Monday's batting-practice session at the Ballpark in Arlington.

"I felt much better today," Webb said. "I was just trying to let it air out. My [fastball] was good, my [sinker] was good. I flipped a few curve balls and changeups, and they were good. It was by far better than my last batting-practice session. At first, I was a little wild, but then I got after it pretty good.

"I aired it out and got some velocity going. I kept my arm loose and the ball was coming out better, more life and velocity than before."

Webb, who had shoulder surgery on Aug. 3, 2009, and hasn't pitched in a Major League game in two years, has been up and down since the start of Spring Training and still hasn't pitched in any kind of a game yet.

"I don't know what the next step is," Webb said.

Washington passes Oates for winning mark

BALTIMORE -- Ron Washington moved past Johnny Oates and into second place as far as all-time winning percentage among Rangers managers with the club's season-opening, six-game winning streak.

Washington is also the leader if you set a minimum of two seasons managed.

Washington, entering Friday's game against the Orioles, is 337-317 for a winning percentage of .51529. Oates had a record of 506-476 as manager of the Rangers from 2007-10 for a winning percentage of .51475. Officially, both are at .515 but Washington has moved ahead for now.

"That's not anything that I think about," Washington said. "If you hadn't told me, I wouldn't have known. Things like that, I will think about after my career is over, but I hope that's not for a long time."

Billy Hunter had a .575 winning percentage as manager of the Rangers for the second half of the 1977 season and the entire 1978 season, before he was dismissed. Hunter, Oates and Washington are the only three Rangers managers who had winning records while being on the job for more than one game. Kevin Kennedy was 138-138 from 1993-94.

Washington is still third in total games managed. Bobby Valentine leads with 1,186 games, Oates managed 983 games and Washington has been on the job for 654 contests going into Friday night.

Rangers acquire two pitchers for future

BALTIMORE -- The Rangers added two relievers for future use on Friday when they signed free-agent pitcher Manuel Corpas and claimed Ramon Aguero from the Pirates.

Corpas had Tommy John elbow reconstruction surgery in September and will not pitch this year. But he was once an effective reliever for the Rockies, with had 19 saves and a 2.08 ERA over 78 games when they went to the World Series in 2007.

He could be an option for the Rangers in their bullpen in 2012.

"It's a big arm and a guy who has had success in a Major League bullpen and success in the back end of the bullpen," Rangers assistant general manager Thad Levine said. "It's a low-risk potential way to add to our stable of arms as we look to build on a championship bullpen in 2012."

Corpas, 28, was 3-5 with a 4.62 ERA and 10 saves in 56 games for the Rockies last season. Over his career, he has a 3.93 ERA and 34 saves in 280 games while averaging 9.5 hits, 2.5 walks and 6.5 strikeouts per nine innings. The Rockies released him at the end of last season.

Aguero was claimed off the Pirates' 40-man roster after he was designated for assignment at the end of Spring Training. He had some back troubles during spring camp and pitched in two games. He also had tendinitis in his right elbow last season.

"When our scouts have seen him, he has been 92-96 [miles per hour] with a good slider," Levine said. "He has had some health issues, and that is why he was available. But he has a good arm, and our pro scouts recommended him."

Aguero, 26, spent each of the previous five seasons (2006-10) with the Pittsburgh organization, going 11-22 with a 4.14 ERA and seven saves in 103 career minor league games. He has never pitched above Double-A. The right-hander has recorded 235 career strikeouts against 101 walks in 267 Minor League innings, while opponents have batted .266 off him.

Long reliever Bush not fretting about inactivity

BALTIMORE -- Rangers starting pitchers took a five-game winning streak into Friday's game and have been averaging just over six innings per start. That has kept long reliever David Bush idle in the bullpen and he remains the only Rangers player who has not appeared in a game.

"I'm still ready to pitch every day," Bush said. "The starters have thrown very well, and I understand the situation. Most of my innings are going to come when the starter comes out early. I'm happy if the starters go seven or eight innings. That means we're doing very well. But I show up every day ready for anything."

Bush has been a starter for his entire Major League career. He has made 184 career starts since debuting in the big leagues with Toronto in 2004, compared to nine relief appearances. Those were in emergency situations; he had never been a full-time reliever until making the Rangers as the long man out of Spring Training.

"This is my first time as a bullpen guy since college or my first year in pro ball," Bush said. "It's still a little bit of an adjustment. But I play catch and long-toss every day and had a bullpen session and the end of [Wednesday's] game. I'm doing things to stay sharp and be prepared without overdoing it."

Date with Sabathia looms on Rangers' horizon

BALTIMORE -- The Rangers are on a collision course with Yankees ace CC Sabathia next weekend when they travel to Yankee Stadium. Sabathia is scheduled to pitch Sunday against the Red Sox, meaning he will be on track to pitch against the Rangers either Friday or Saturday during the three-game series in the Bronx.

The Yankees have an off-day on Monday. If they use that day to skip their fifth starter, Freddy Garcia, then Sabathia will pitch on Friday against the Rangers. Otherwise, they will push him back to Saturday.

Either way, the Rangers will face the veteran left-hander, who won 21 games last season and is 8-3 with a 4.29 ERA in 14 career starts against the Rangers.

Worth noting

• Friday was Rangers bullpen catcher Josh Frasier's birthday.
• The Rangers were the first American League team to go 6-0 to start the season since the Royals went 9-0 in 2003.
• The Rangers are only the fourth team in 75 years to go 6-0 to start the season after playing in the World Series the previous October. The others were the 2003 Giants (7-0), 1998 Indians (6-0) and the 1985 Tigers (6-0).

T.R. Sullivan is a reporter for MLB.com. Read his blog, Postcards from Elysian Fields and follow him on Twitter @Sullivan_Ranger. This story was not subject to the approval of Major League Baseball or its clubs.