MLB Baseball Betting: Giants at Nationals

Do you have your money on the Nationals? (AP Images)"]
Randy Johnson looks to become the 24th pitcher to reach 300 wins as the San Francisco Giants continue a three-game road series against the woeful Washington Nationals tonight.

Johnson, who's held opponents to one run in consecutive starts, is 4-3 with a 2.99 ERA lifetime against the Washington franchise, including an 11-7 win over the Nationals on May 11.

The -115 favored Nationals ended a six-game losing streak with an 10-6 win in the series opener Tuesday night, but it was just their fourth win in 22 games since May 10.

Washington's struggles led to the firing of pitching coach Randy St. Claire on Tuesday. The Nationals, last in the majors with a 5.67 ERA, promoted Steve McCatty from Triple-A to replace him.

McCatty has little time to help develop rookie Jordan Zimmermann, who will match up against Johnson in tonight's game.