MLB said Tuesday that Rizzo was disciplined, without providing specifics.
In general, penalties for non-uniformed personnel involve fine.
Rizzo was upset that Hamels hit Nationals rookie Bryce Harper with a pitch on Sunday night and then said he deliberately tried to plunk him. Hamels was suspended for five games by MLB on Monday and fined.
Rizzo told The Washington Post that Hamels' act was "classless" and "gutless." He also said Hamels was "fake tough."
In May 2011, Rizzo was disciplined by MLB after he verbally confronted umpires in a stadium tunnel following a loss to the New York Mets.