Orioles fire manager Dave Trembley  —  Dave Trembley walks onto the field to argue a call during the first inning of Thursday's 6-3 loss to the New York Yankees.  He compiled a 187-283 (.398) record guiding the club, the second-worst winning percentage of any manager in Orioles history.

Mets Designate Gary Matthews Jr. For Assignment  —  The Mets designated Gary Matthews Jr. for assignment, according to the team.  They also called catcher Omir Santos and infielder Ruben Tejada up and placed Luis Castillo on the 15-day DL in related moves.  Matthews earns $11MM this year …

Rangers' Beltre Incites Bench-Clearing Brawl After Walk-Off Home Run  —  When you hit a walk-off home run, it's usually best to celebrate after you cross home plate.  —  Unless, apparently, you are Rangers high Class A Bakersfield center fielder Engel Beltre.

Atlanta Braves place reliever Takashi Saito on DL  —  LOS ANGELES — The Atlanta Braves placed reliever Takashi Saito on the 15-day disabled list with a strained left hamstring and recalled reliever Craig Kimbrel from Triple-A Gwinnett before Friday night's game against the Los Angeles Dodgers.

Royals pleased with Yost  —  KANSAS CITY — Royals manager Ned Yost gets a positive rating so far from general manager Dayton Moore.  —  “I think he's done a terrific job,” Moore said.  “He's very focused and he intends on getting where this organization needs to be. ...

Burrell joins Giants; Bowker sent down  —  Former Phillies slugger expected to join team in Pittsburgh  —  Pat Burrell, the onetime Phillies mainstay, will be back playing ball in Pennsylvania on Friday night.  —  But it will be in Pittsburgh, with the Giants, who on Friday purchased his contract from Triple-A Fresno.

Yeah, he's that good  —  Bryce Harper, 17, will likely be the No. 1 overall pick by the Nationals on Monday  —  Harper, a Scott Boras advisee, is the perhaps the best power-hitting prospect in years.  —  GRAND JUNCTION, Colo. — Bryce Harper's batting practice sessions are prolific, for sure.

Following Jim Joyce's perfect game call, Bud Selig's stance on instant replay not popular, but right  —  While Bud Selig fiddled with what to do about Armando Galarraga's lost perfect game Thursday, the rest of baseball, along with outraged fans around the world, fumed - renewing the cries for the increased use of instant replay.

Starting Pitching Stock Market  —  Which starters will provide steady returns over the next 10 years?  We asked around  —  ESPN.com  —  We probably should have hauled in Jim Kramer or Maria Bartiromo to guest-author this edition of Rumblings, because the subject this week is the stock market.