Colorado @ San Francisco preview

Last Meeting ( Jun 14, 2014 ) Colorado 5, San Francisco 4

The Colorado Rockies, with their first series victory in San Francisco since 2010 secured, try for an improbable three-game sweep Sunday against the Giants. Colorado prevailed 5-4 on Saturday after Brandon Barnes delivered a two-run, inside-the-park homer with two outs in the ninth inning, one day after scoring five runs in the ninth to win 7-4. Both uprisings came against closer Sergio Romo, who has yielded 11 runs in three innings over his last four appearances against the Rockies.

The Rockies, who won consecutive road contests in the same series for only the second time this season, are on their first four-game winning streak since last August. The Giants' Buster Posey drove in a season-high three runs on Saturday - his most since July 12 - but couldn't prevent first-place San Francisco from losing for the fifth time in its last six contests and falling to 35-2 when leading after eight innings. San Francisco's Madison Bumgarner is coming off his first loss in seven decisions as he opposes Juan Nicasio, who yielded career highs in runs (10) and homers (three) in his last turn while being reminded of a horrific injury from his past.

TV: 4:05 p.m. ET, ROOT (Colorado), CSN Bay Area (San Francisco)

PITCHING MATCHUP: Rockies RH Juan Nicasio (5-5, 5.70 ERA) vs. Giants LH Madison Bumgarner (8-4, 2.67)

Nicasio suffered a fractured skull and broken neck after a line drive by Washington's Ian Desmond struck him in 2011 and he appeared visibly shaken when Justin Upton's liner sailed by his head in Atlanta's 13-10 victory over Colorado on Tuesday. "That was a little too close," Rockies manager Walt Weiss told reporters after the 27-year-old Dominican lost his third straight start while seeing his ERA grow by more than two runs during that span. Nicasio, who is 2-3 with a 4.67 ERA in five road starts this season, is 2-1 with a 2.73 ERA while not yielding a home run in six career outings against San Francisco.

Bumgarner, the National League Pitcher of the Month for May after going 5-0 with a 2.08 ERA, allowed two runs and eight hits in seven innings of a 2-1 loss to Washington on Tuesday - his first setback since April 28 and fifth straight quality start. The 24-year-old North Carolina native is 4-0 with a 2.55 ERA in his last four starts at home and 4-1, 2.06 in seven turns against Colorado at AT&T Park. Bumgarner is 0-1 with a 3.21 ERA in two outings against the Rockies at Coors Field in 2014.

WALK-OFFS

1. Rockies SS Troy Tulowitzki, who leads the majors in batting at .356, flew out as a pinch hitter Saturday after injuring the middle toe on his right foot Friday.

2. San Francisco is 19-7 in day games - best in the majors - while averaging 5.4 runs compared to 3.7 in 43 night contests.

3. Colorado LHP Rex Brothers on Saturday became the 76th pitcher in major league history to strike out the side on nine pitches.

PREDICTION: Giants 3, Rockies 2