Dangerous at home, weak on the road. That's always been the Rockies' style and it's the same this year. Colorado has lost 20 of its last 27 games and is a dreadful 7-15 away from Coors Field.

Things don't figure to improve in this series opener with disappointing German Marquez facing lefty Carlos Rodon.

Marquez is 1-5 with a 6.71 ERA. He's in terrible form with a 7.94 ERA in his last three starts. Marquez has made 14 career starts against the Giants and is 4-8 against them with a 7.19 ERA.

Rodon faced the Rockies on May 9. He held them to two runs on six hits in six innings while posting a season-high 12 strikeouts. Colorado is 1-6 the last seven times going against a southpaw starter.

San Francisco has dominated Colorado going 20-5 since the start of last season. The Giants have won 12 of the last 13 meetings.