NBC Sports has a new video feature that gives you all the basics of a given topic in lightning-round fashion. We call it 30 Seconds To Know, and the name pretty much says it all.
Our first baseball installment: the replay rule. Let’s see if I can beat the buzzer:
Cardinals starter Michael Wacha suffered a strained left oblique muscle during his start this afternoon against the Phillies, causing him to leave in the fourth inning.
Wacha is 8-2 with a 3.20 ERA and a 71/36 K/BB ratio in 84.1 innings across 15 starts this season with St. Louis. To the extent he has to miss some time — and obliques invariably send starters to the disabled list — potential fill-in candidates include John Gant, Daniel Poncedeleon and Dakota Hudson.