St. Louis Cardinals manager Mike Shildt said that starting pitcher Adam Wainwright's (back) injury isn't very serious and there's a chance he could start on Sunday against the Diamondbacks. Wainwright was scratched on Friday due to spasms in favor of Daniel Poncedeleon. The good news is that it doesn't look like the veteran right-hander will need to go on the injured list. The 37-year-old has been hit or miss with a 4.31 ERA, 1.38 [...]