Cousins (knee) was placed on injured reserve Saturday, per the NHL media site.
Cousins (knee) is expected to miss the next 6-8 weeks, per Bruce Garrioch of Postmedia on Wednesday.
Cousins logged an assist and three hits in Tuesday's 3-2 overtime loss to the Red Wings.
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