Cousins inked a one-year, $800,000 contract with Ottawa on Thursday, RDS.ca reports.
Cousins provided a goal and an assist in Florida's 6-0 victory over Ottawa on Thursday.
Cousins scored two goals including the game-winner in Tuesday's 5-3 victory over the Devils.
Cousins (concussion) will be activated off injured reserve and return to the lineup Tuesday versus Philadelphia.
Cousins (concussion) has been given the all-clear to practice but is still considered day-to-day and won't be ready to face the Penguins on Friday, Jameson Olive of the Panthers' official site reports.
Per Jameson Olive of the Panthers' official site, Cousins has yet to resume skating as he is still experiencing concussion symptoms, according to coach Paul Maurice.
Cousins was placed on injured reserve Friday, according to Colby Guy of Florida Hockey Now
Cousins is in the concussion protocol, coach Paul Maurice told Jameson Olive of the Panthers' official site on Wednesday.
Cousins was unable to practice Wednesday, Jameson Olive of the Panthers' official site reports, which comes after he appeared to have been injured against Arizona on Tuesday, per David Dwork of The Hockey News.
Cousins potted the game-winning goal in a 3-2 victory over Seattle on Saturday.