This isn't exactly new, but I couldn't find any interviews or clips where Scotty McCreery spoke about this, so I asked him.
Back in the day, Scotty sang the national anthem before game 1 of the 2011 World Series. If you skip ahead to the 2:56 mark, you'll hear what got peoples panties in a bunch. Did he say "no Jose" or "oh say?"
Here's my interview where we discuss the anthem, who would be on his country music Mount Rushmore, among other things.