I cannot think of a time when the Rockies have won back-to-back games with comebacks in the ninth inning. More importantly, I am pretty sure I can say they have never comeback in the ninth inning with two outs using an inside the park home run to win the game. This is something only the Giants are normally capable of. While those two things are hard to prove and I will not do the research to do it, Here is some interesting information on the improbability of the most recent two games.
This is only the second time this season that the Rockies have won two games in a row on the road. The other time was one in LA and then two in Arizona. Many have already said it has been since 2010 since the Rockies won a road trip in San Francisco. That season is also the last time the Rockies came back from a deficit to win a game in San Fran. In fact they did it twice that season, just not in back-to-back games.
The first was on June 1st in a game started by Jason Hammel. The Rockies finally got to Bary Zito in the seventh after falling down early 1-0 on an Andres Torres solo home run. Clint Barmes hit a sacrifice fly to tie the game and it went in to extra innings. It again was Barmes, this time hitting an RBI double, giving the Rockies another run to take the lead in the top of the eleventh and Manny Corpas was able to get the save in the bottom of the inning while giving up only one hit.
The second comeback that year was on August 30th. This game was actually very similar to Saturday's game. The Rockies were threatening to squander a strong start from Jorge De La Rosa, 7IP 1ER 9K, when they came to bat down 1-0 in the ninth. After a leadoff walk by Dexter Fowler, Carlos Gonzalez tripled to score Dex and then came home on a throwing error...almost the same as an inside the park home run. Houston Street then set the Giants down in order in the bottom half of the inning to earn the save.
What will happen today? History is not on the side of the Rockies, as I also cannot recall a time that they swept the Giants in San Fran. However, this is a team that has rediscovered strong starting pitching, timely relief outings, and the offense is playing together to be better than the individual parts. I just don't know if it will be enough against Madison Bumgarner.