Valentine: Pedroia on DL with new thumb injury  —  The Boston Red Sox put second baseman Dustin Pedroia on the 15-day disabled list Friday with what manager Bobby Valentine called a sprained right thumb.  —  Infielder Pedro Ciriaco was recalled from Triple-A Pawtucket to take his place.

Colvin hits two homers as Rockies beat Nationals  —  WASHINGTON — Tyler Colvin homered twice off Stephen Strasburg to back a masterful pitching performance by Drew Pomeranz and lead the Colorado Rockies past Washington 5-1 Friday night, ending the Nationals' four-game winning streak.

Orioles “Going Hard” After Greinke  —  The Orioles are “going hard” after Brewers right-hander Zack Greinke, an MLB executive told Dan Connolly of the Baltimore Sun.  The Orioles appear to be the most aggressive suitor for Greinke, but talks are preliminary, Connolly reports.

Expect Astros managerial change in '13  —  No team has fired its manager this season.  But at least one is expected to make a move after the season ends, according to major-league sources.  —  The Houston Astros, under new ownership and a new front office, likely will dismiss manager Brad Mills, sources said.

D-backs may consider offers for Upton  —  Right-handed power hitters are in short supply on the trade market.  —  That could change, however, if the Arizona Diamondbacks fall from contention.  —  At that point, the D-backs would consider offers for right fielder Justin Upton, according to major-league sources.

Joba Chamberlain on track to pitch in minors next week  —  Photo credit: Newsday/Thomas A. Ferrara |  Yankees reliever Joba Chamberlain points while on the mound in the seventh inning against the Tigers on Opening Day 2011.  (Mar. 31, 2011)  —  TAMPA, Fla. — Joba Chamberlain feels ready …

Peavy leads White Sox to fourth straight win, over Blue Jays  —  CHICAGO — Jake Peavy pitched one-run ball into the eighth inning for his first victory since May 26, A.J. Pierzynski homered and the Chicago White Sox won their fourth straight by beating the Toronto Blue Jays 4-2 on Friday night.

Twins Hand Rangers Fifth Straight Loss, 5-1  —  ARLINGTON, Texas (AP) — Joe Mauer and Justin Morneau drove in two runs each, Francisco Liriano pitched around six walks and the Minnesota Twins handed the Texas Rangers their season-high fifth straight loss with a 5-1 win Friday night.

Rizzo homers, Cubs stop Mets' rally in 9th inning for win  —  NEW YORK — Anthony Rizzo hit a three-run homer and Cubs closer Carlos Marmol caught a line drive and started a game-ending double play that blunted the New York Mets' bid for another ninth-inning comeback, giving Chicago an 8-7 win Friday night.

Carter's HR powers A's past Mariners 4-1 in 11th  —  OAKLAND, Calif.—Chris Carter hit a three-run homer in the bottom of the 11th inning, powering the Oakland Athletics past the Seattle Mariners 4-1 on Friday night to match a season-high five-game winning streak.

Rays Sign No. 6 International Prospect Jose Castillo  —  Venezuelan lefthander Jose Castillo, a 16-year-old who ranks as the sixth-best international prospect for July 2, has signed with the Rays for $1.55 million.  —  Castillo is 6-foot-4, 200 pounds and has impressed scouts with his delivery and power arm.

Drew Smyly strikes out 10 as Tigers top Royals to reach .500  —  DETROIT — Rookie Drew Smyly struck out a career-high 10 in six impressive innings and Delmon Young homered as the Detroit Tigers beat the Kansas City Royals 4-2 Friday night.  —  The win got the Tigers (42-42) back to .500 for the first time since May 15.

Pearce, Gonzalez lead Orioles past Angels  —  ANAHEIM, Calif.—Steve Pearce hit a three-run homer, Miguel Gonzalez pitched seven stellar innings in his first career victory, and the Baltimore Orioles hung on to beat the Los Angeles Angels 3-2 Friday night.  —  Gonzalez (1-0) …

Cabrera help Giants snap losing streak with win over Pirates  —  PITTSBURGH — Melky Cabrera hit his eighth homer of the season, Ryan Theriot drove in two runs and the San Francisco Giants beat the Pittsburgh Pirates 6-5 on Friday night.  —  Barry Zito (7-6) survived five eventful innings …