Ritchie skated on the Ducks' top line Tuesday.
The 22-year-old was a restricted free agent who held out for the first nine games of the season. He agreed to a three-year contract worth a reported $4.6 million last Wednesday.
In a corresponding move, Anaheim placed winger Jakob Silfverberg on injured reserve. Silfverberg has been dealing with a broken finger he suffered on Oct. 14, but he's not expected to be out long term.