The San Francisco Giants will wrap up a lengthy road trip with Sunday's rubber match of this three-game set against the St. Louis Cardinals. They dropped a 7-4 decision on Saturday, and I think the Cardinals will prevail again tonight.

Here are my keys to the game:

1. Pitching - The Cardinals hand the ball to Carlos Martinez (5-5, 3.69) who is 1-1 with a 5.40 ERA in three career appearances against the Giants, but his only previous start in the series came in July 2014. He's coming off his best start of the year though when he threw eight shutout innings of five-hit ball in a 6-0 win at Milwaukee, fanning eight batters in the process. The Giants counter with Jake Peavy who tossed seven scoreless innings of one-hit ball at Atlanta his last outing, but he is still just 1-3 with a 7.20 ERA in five turns on the road this season.

2. The Cardinals Bats - Several Cardinals hitters are red hot at the moment. Brandon Moss has homered in three of his last six games while Brandon Crawford has three consecutive two-hit performance and six in his last 11 contests just to mention a few.

3. X-Factor - The Giants have lost each of Peavy's last eight road starts against a team with a winning record.

Selection: This is a play on the St. Louis Cardinals (8*)