That's because Fox has rights to all MLB games that start on Saturday before 4:10pm. I love MLB TV, but that is pretty dissatisfying. Living in FL, and working M-F, it sucks to not be able to watch Saturday afternoon games while grilling.
"I am insane. I am childish. I once drank an entire bottle of wine while watching Michigan and God's favored child Denard Robinson lose in Ohio Stadium to an undefeated Ohio State team BANNED FROM BOWL COMPETITION FYI JUST WANTED TO MENTION THAT FOR NO REASON."