Who's John Dewan? Author of The Fielding Bible and baseball statistics guru/luminary. He's a candle in a bag??? That's one meaning. Merriam-Webster's first meaning though is "a person of prominence or brilliant achievement."
He didn't really steal home. They picked Hart off first and threw to second to get him for the third out. Eckstein tagged him, but the ump was out of position and blew the call and Bill Hall made it home.