White Sox manager Ozzie Guillen also was suspended, for one game. He and Riske were each fined an undisclosed amount by Bob Watson, vice president of on-field operations for Major League Baseball.
Riske's suspension was scheduled to start with Thursday night's home game against the Cardinals, unless the reliever appeals. Guillen was required to serve his penalty Thursday -- there was no appeal process available for him.
Riske and Guillen were ejected in the seventh inning of Chicago's 20-6 victory Tuesday night after the right-hander hit Duncan with a pitch.
The benches had been warned in the bottom of the sixth after St. Louis pitcher Sidney Ponson plunked two White Sox batters with the
Chris Duncan was sent to the minors Thursday. His father,
Cardinals pitching coach Dave Duncan, called Guillen a liar during
a radio interview.
Guillen and the pitching coach did talk on the field Wednesday.
"I was upset. I'm still upset. I don't like liars," Duncan
said before Thursday night's game.