Giants 3, Orioles 2: Hunter Pence delivered a two-run double and Chad Gaudin tossed five strong innings as host San Francisco snapped Baltimore’s three-game winning streak.

The Giants trailed 1-0 before scoring three times in the sixth off Wei-Yin Chen (6-5) when Marco Scutaro singled in a run and Pence lined a two-run double down the right-field line with two outs. The win was San Francisco's eighth in its last 26 home games.

Chris Davis led off the eighth inning with his major league-leading 42nd homer for Baltimore, which fell 5 1/2 games back of first-place Boston Red Sox in the American League East and remained 1 1/2 games back of the second wild-card spot in the American League.

Gaudin threw 93 pitches through five frames while allowing one unearned run before Guillermo Moscoso (1-0) tossed two scoreless innings for the win. Sergio Romo worked around a leadoff single in the ninth for his 28th save.

The Orioles, who won the first three games of their eight-game road trip, had two runners on with one out in the eighth before Santiago Casilla struck out Ryan Flaherty and Matt Wieters to end the threat.

GAME NOTEBOOK: The Giants improved to 38-6 when leading after seven innings. … Chen allowed three runs on five hits over six innings. ... RF Nick Markakis had three hits for the Orioles, who lost for the fourth time in their last 12 road games.