Poulin retired from professional hockey Wednesday, Jessika Lemay of Toursurlehockey.com reports.
Poulin agreed to terms on a one-year contract with Swedish club IF Bjorkloven on Tuesday.
Poulin signed a contract with the Kings on Saturday, Zach Dooley of LAKingsInsider.com reports.
Poulin underwent surgery to repair a dislocated knee cap Wednesday, and will be sidelined for the next 4-to-6 weeks while recovering from the procedure, Randy Sportak of the Calgary Sun reports.
The Flames acquired Poulin from the Lightning in exchange for future considerations on Thursday.
Poulin has been recalled from AHL Syracuse, Erik Erlendsson of The Tampa Tribune reports.
Poulin cleared waivers Sunday and has been assigned to AHL Syracuse, Bryan Burns of NHL.com reports.
The Lightning placed Poulin on waivers Saturday, Joe Smith of the Tampa Bay Times reports.
Poulin has made the Lightning's roster and will be the team's backup goalie, reports the Tampa Bay Tribune.
Poulin could make the opening-night roster, reports the Tampa Tribune.