Simon agreed to a two-year contract with HC Sparta Praha on Saturday.
Simon picked up four assists in 17 games after he was traded from the Penguins to the Ducks in March.
Simon notched an assist in Sunday's 5-2 loss to the Hurricanes.
Simon posted an assist in Saturday's 4-1 loss to the Sharks.
Simon exited the NHL's COVID-19 protocols Saturday, Matt Vensel of the Pittsburgh Post-Gazette reports.
The Penguins placed Simon in COVID-19 protocol Monday.
Simon contributed an assist and two PIM in Sunday's 3-2 win over the Devils.
Simon (undisclosed) is in the lineup for Wednesday's game versus the Oilers.
Simon managed an assist and two shots on goal in Monday's 3-1 win over the Jets.