Since you have already jinxed the mess with your post --- the only worse jinx than the LS playoff jinx is if you worked for Sports Illustrated and put the team on the cover

so........I guess there is no further damage that can be done

I would look at the home and away set up first
(if you are tempting the baseball gods thinking play offs and make a jinx post)

I think you pitch Lackey at home
Wacha probably has better splits home than away but he also is the 'ace' in a Wainwrightless rotation.
Garcia doesn't get much in the way of run support so I don't think home or away is not much difference
Martinez is probably neutral as well

Right now Lynn makes it an adventure when he is pitching and might benefit with a skipped start but I would be surprised if Matheny sits him

6 games with Pirates and 6 with the Cubs left--it ain't gonna come easy but they control how tight the race is going to be