SAN FRANCISCO — Blake Snell struck out a career-high 15 in six innings in the San Francisco Giants' opening 4-1 victory over the Colorado Rockies, and Hayden Birdsong fanned eight over five innings in a 5-0 win in the second game for a doubleheader sweep Saturday night.
Patrick Bailey hit a tiebreaking, two-run double in the seventh inning in opener. In the second game, Tyler Fitzgerald hit his eighth homer in 10 games.
Snell had the most strikeout in the majors this season and the most for an outing of six innings or under since at least 1901. The reigning NL Cy Young Award winner struck out 15 of 18 batters.
''Cy Young Award winner last year for a reason — doing stuff like this,'' said Giants manager Bob Melvin, who also managed Snell last season in San Diego.
Snell induced 30 swings and misses, one shy of Tim Lincecum in the 2010 NL Division Series opener against Atlanta for the Giants' most since pitch tracking started in 2008.
''Putting together some good starts,'' Snell said. ''I'm starting to have more confidence, understanding how to make adjustments quicker now.''
Snell noticed how many strikeouts he had and was attempting to top his prior career best of 13, accomplished four times.
''I wasn't trying early on,'' Snell said. ''Last couple innings, I was really trying. I knew where I was at: I need to get 13. I want 13. After the sixth, I was well aware of what I was trying to do.''