Michael Wacha is pitching his best ball of the season. Tom Koehler is dreadful with a terrible road history. So the choice is simple here - and the price isn't sky high to back the Cardinals.

The Marlins are 3-14 in Koehler's last 17 starts and 2-7 during his past nine road starts. Koehler's road ERA is 4.65 during the last three years compared to 3.65 at Marlins Park. He has been so bad this season that the Marlins sent him down to the minors.

Koehler resurfaced for a start this past Saturday against the Brewers. He couldn't get out of the second inning giving up seven earned runs on six hits and two walks, including a homer. I'm surprised the Marlins are giving him another shot.

Wacha, meanwhile, is 2-0 with a 1.69 ERA in his past three starts. He struck out a season-high nine in a 2-1 win against the powerful Nationals this past Saturday. Wacha threw a four-hit, six-inning shutout against the Nationals.

The Marlins are 17-24 on the road. The Cardinals are 22-8 in Wacha's last 30 starts versus opponents with a sub .500 record.

The Cardinals should have Jedd Gyorko, their leading hitter, back in the starting lineup.