Gamblers

(He was also known as Meyer Wolfshiem in a national phenomenon book called "The Great Gatsby" by Scott. F. Fitzgerald).
The big idea Rothstein had was to put all of his money on the Cincinnati Reds to win it all, and at the same time bribe the White Sox players to intentionally lose the World Series. In fact Rothstein placed over $270,000 on the Reds winning the series.
The Big Bankroll was the main financial support throughout the series for the players. In order to keep a low profile though, Arnold supplied the money through a man named Abe Attell. Abe was a former heavyweight boxing champion.
When it came down to the trial, The Big Bankroll had it all planned out already. He denied any involvement, and blamed it all on Abe. Although what he was doing was prohibited by the law, he was one of the best at it.

Joseph "The Sport" Sullivan

Before the World series even started. First baseman Chick Gandil believed that the series could be fixed, and he could get a lot of money for it. He reached out to Sullivan to express his beliefs.
He came through with $20,000 for the players after the game four performance.

Billy Maharg

Professional Boxer
Was approached by Chick Gandil and/or Eddie Cicotte about the idea of fixing the world series.
Worked in a tandem with Burns.

"Sleepy" Billy Burns

Was approached by Chick Gandil and/or Eddie Cicotte about the idea of fixing the 1919 world series.
Worked as a tandem wiht Maharg.
Payed $10,000 to Gandil after game two.

Abe Attell

Acted as a link between the money distributors (Maharg, Burns, Sullivan) and Rothstein.
Was convicted in 1920 of involvement in the fix.