[Repealthe17thAmendment]

This has never been a custom in major league baseball, not sure why it has suddenly been noticed by this author.

It reminds me of the 2004 National League division series. At the request of Canadian-born Larry Walker of the St. Louis Cardinals, the Dodgers and Cardinals shook hands at the end of the series, mush like they do in the NHL during the Stanley Cup playoffs. Walker said it was a tradition that didn't catch on, and as far as I know, remains the only time it has happened in MLB.

[Fido969]

Red Sox and Yankees will often embrace to congratulate each other.

[rfp1234]

Cards lost that WS to the Red Sox. If baseball players are as superstitious as hockey players, that may explain why handshakes weren't attempted the following year.

Had St. Louis won, they might have seen it as a good luck sign and tried to follow up the year after.