My logic was San Diego is last in team wRC+ at 81 and they're in a extreame pitchers park in St Louis (-88).
I don't pay too much attention into a previous start. Lackey has been good overall this year and is playing a s*** team in a good park. Strasburg (who i'm pretty sure got hit hard too last start) was my #2 choice, but i liked the value of Lackey.