1
The top 3 are easy enough but I've prob'ly been told twenty times that HOU is number 4 and still don't remember. LOL.
According to this list, Brooklyn and Queens both come in ahead of Houston :- ) and Manhattan is #7. I'm guessing the NY metro area is good-sized.
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Yes, super cool that NY - LA - Chi - Hou are the four teams remaining, and three of those are "super teams" according to Fangraphs.