Exclusive: Red Sox stars blast manager Bobby Valentine in heated July meeting with ownership  —  Boston Red Sox players blasted manager Bobby Valentine to owners John Henry and Larry Lucchino during a heated meeting called after a text message was sent by a group of frustrated players to the team …

Blue Jays sign Jeff Mathis to extension  —  The TORONTO BLUE JAYS have signed C JEFF MATHIS to a two-year, $3 million dollar (US$) contract for the 2013, 2014 seasons with a $1.5 million dollar club option for the 2015 season.  Affirming his commitment to the organization and the City of Toronto …

Chase Headley of the San Diego Padres named National League Player of the Week  —  San Diego Padres third baseman Chase Headley has been named the National League Player of the Week for the period ending August 12th.  The announcement was made earlier today on MLB Network.

Mariners Sign Brazilian Lefthander Luiz Gohara  —  The Mariners have signed Brazilian lefthander Luiz Gohara, the No. 7 international prospect for July 2.  —  Gohara, who turned 16 on July 31, is 6-foot-3, 220 pounds and some teams felt he was the top pitching prospect available in this year's international signing class.

Desmond's rehab keeps chugging along  —  SAN FRANCISCO — Ian Desmond is ramping up his rehab once again.  —  Desmond, on the disabled list since July 22 with a torn left oblique, went through his first full pregame workout with the Nationals on Monday at AT&T Park.

Mets acquire Kelly Shoppach from Red Sox  —  The Mets announced they have claimed C Kelly Shoppach off waivers from the Red Sox for a player to be named later.  —  4:20 pm: Today at Great American Ballpark, Terry Collins told reporters he intends to use Shoppach primarily against left-handed pitching.

For Mets, re-signing R.A. Dickey likely to be expensive  —  NEW YORK — The dust has settled, the camera crews have packed up, and R.A. Dickey's hype-riddled summer is almost over.  His time in the national spotlight has faded.  He is now merely one of the finest pitchers in the National League …

ROOKIE ROSENTHAL RETURNING TO CARDINALS BULLPEN  —  ST. LOUIS  • Rookie Trevor Rosenthal, the hard-throwing righty who vaulted from Class AA to the majors last month, is being recalled this afternoon to add some fresh power to the big-league bullpen.  —  Rosenthal, 22 …

Tuesday's pitching preview: Young vs. Latos  —  Chris Young (3-6, 4.87 ERA) will start for the Mets tonight.  —  Young was ineffective in his last start against the Marlins when he allowed seven runs in only 4 1/3 innings.  Overall, left-handed hitters have hit .299 with six home runs and a .522 slugging percentage against Young.

White Sox Agree To Terms With Dominican Righthander Victor Done  —  The White Sox have agreed to terms with Victor Done, a 16-year-old righthander from the Dominican Republic.  —  Done is 6-foot-3, 190 pounds with a solid delivery for his age and a fastball that has reached 91 mph.

Garza comeback appears doubtful for 2012  —  Cubs manager Dale Sveum said at a WGN-AM 720 luncheon Tuesday that Matt Garza is unlikely to return this season, as most speculated when Garza was put on the disabled list Aug. 6 for a right elbow stress reaction.

Strained hamstring sends Saito to disabled list  —  Takashi Saito has a 6.14 ERA in 10 appearances for the D-backs this season.  —  The D-backs placed reliever Takashi Saito on the 15-day disabled list with a strained left hamstring on Tuesday.  Arizona recalled southpaw Mike Zagurski from Triple-A Reno to take Saito's roster spot.