Giants 4, Rockies 1: Yusmeiro Petit broke the major league record for consecutive batters retired and struck out a season-high nine to lift host San Francisco to its third straight victory.

Petit (4-3), making his first start in place of Tim Lincecum in the rotation, allowed one run and four hits in six innings. The right-hander broke the previous record of 45 retired in order set by the Chicago White Sox's Mark Buehrle in 2009 before the string was snapped at 46 on pitcher Jordan Lyles' double with two out in the third.

Gregor Blanco hit a two-run homer, Andrew Susac and Hunter Pence added RBIs and Angel Pagan recorded three hits as the Giants maintained their 1 1/2-game lead over Atlanta for the National League's second wild card spot and climbed to within 4 1/2 of Los Angeles in the West. Jean Machi and Sergio Romo each pitched an inning before Santiago Casilla worked around a lead-off walk in the ninth to record his 12th save - and 11th in 12 chances since becoming the full-time closer last month.

Charlie Blackmon followed Lyles' two-base hit with an RBI single as Colorado fell to 3-17 on the road since the All-Star break while dropping to a major league-worse 19-47 away from home. Lyles (6-2) had his seven-start unbeaten streak snapped after yielding three runs, four hits and three walks in six innings.

San Francisco's Pablo Sandoval singled to start the second and one batter later, Blanco crushed a 2-1 slider out to right for his third of the season. The Giants loaded the bases with one out in the sixth on a single and a pair of walks before Pence lifted a sacrifice fly, and Susac delivered an RBI single in the eighth.

GAME NOTEBOOK: Colorado 1B Justin Morneau (.314, 14 home runs, 69 RBIs) was claimed off the waiver wire by Milwaukee, but the two teams reportedly could not agree on a deal. ... San Francisco starting pitchers posted a 0.90 ERA in the four-game series with 35 strikeouts in 30 innings. ... Rockies C Jackson Williams recorded his first major-league hit in his second career at-bat - a single to center with one out in the fifth - before being stranded.