The Giants came into L.A. trailing the Dodgers in the NL West by just 3.5 games, but lost ground with a 5-4 loss in the series opener last night. We'll see a pair of aces face off here on Tuesday, and my money is on Zack Greinke to come away with the win. Here are my keys to the game: 1. Pitching - Greinke (14-3, 1.61 ERA) tossed seven scoreless frames in a 1-0 win at Cincinnati in his last start. He's 7-1 with a 1.42 ERA in 14 starts at Chavez Ravine in 2015. The Giants counter with Madison Bumgarner, who can tie Jake Arrieta for the major league lead with his 17th win. There aren't a lot of negative things to say about Bumgarner, but it is worth noting his ERA of 4.17 on the road is more than double what it is at home. 2. Previous History - Greinke is 6-0 with a 2.28 ERA in eight career starts versus San Francisco, and the Dodgers are 45-21 at home this season. 3. X-Factor - The Giants have lost eight of their last 10 road games. Selection: This is a play on the LA Dodgers (10*)