Boston Red Sox's Daniel Nava, right, is congratulated after scoring against the Oakland Athletics in the first inning of a baseball game, Monday, July 2, 2012, in San Francisco. Nava scored on a single by Boston's Dustin Pedroia. (AP Photo/Ben Margot)

Boston Red Sox's Daisuke Matsuzaka works against the Oakland Athletics in the first inning of a baseball game, Monday, July 2, 2012, in San Francisco. (AP Photo/Ben Margot)

Boston Red Sox's Daisuke Matsuzaka works against the Oakland Athletics in the first inning of a baseball game, Monday, July 2, 2012, in San Francisco. (AP Photo/Ben Margot)

Boston Red Sox's Daisuke Matsuzaka stretches in the second inning of a baseball game against the Oakland Athletics, Monday, July 2, 2012, in San Francisco. (AP Photo/Ben Margot)

Oakland Athletics second baseman Jemile Weeks, right, throws over Boston Red Sox's Cody Ross in the fourth inning of a baseball game, Monday, July 2, 2012, in San Francisco. Boston's Ryan Kalish was safe at first base on the failed double play. (AP Photo/Ben Margot)

Boston Red Sox's Daniel Nava tosses his helmet after striking out to Oakland Athletics' Sean Doolittle in the seventh inning of a baseball game Monday, July 2, 2012, in San Francisco. (AP Photo/Ben Margot)

Boston Red Sox's Daisuke Matsuzaka, center, gives the ball to pitcher Clayton Mortensen (59) after being removed from the baseball game against the Oakland Athletics in the second inning, Monday, July 2, 2012, in San Francisco. (AP Photo/Ben Margot)

Boston Red Sox's Dustin Pedroia connects for an RBI single off Oakland Athletics' Jarrod Parker in the first inning of a baseball game, Monday, July 2, 2012, in San Francisco. (AP Photo/Ben Margot)

Oakland Athletics shortstop Cliff Pennington, left, prepares to throw over Boston Red Sox's Dustin Pedroia (15) to complete a double play in the first inning of a baseball game, Monday, July 2, 2012, in San Francisco. Athletics' Jemile Weeks, right, backs up the play. Boston's David Ortiz was out at first base. (AP Photo/Ben Margot)