Most of the markets with MLB teams would be solidly D:
-Boston
-New York
-Baltimore
-Washington
-Chicago
-Los Angeles
-San Francisco+Oakland
-Seattle
Only market that I believe would be solid R is Cincinnati.
What about the Japanese NPB markets or Korean Baseball? Or the greater WBSC global rankings? This would be elected openly by the entire globe as they've also got footprints in places like China, Great Britain, and India too.
Would it be possible in a worldwide election scenario that a complete unknown who wins everywhere else outside of MLB's strongholds (the Minor League/Summer Collegiate smaller markets and lesser popular Baseball areas in the world) could win the seat?