Raffl inked a two-year contract with Swiss club Lausanne HC on Thursday.
Raffl scored two goals including the game-winner in Sunday's 4-2 victory over the Sabres.
Raffl notched an assist, two shots on goal and two PIM in Wednesday's 4-3 win over the Predators.
Raffl (lower body) was activated off injured reserve Wednesday, per Bruce LeVine of Dallas Stars Radio.
Raffl has been placed on injured reserve, per the NHL media site.
Raffl (lower body) is expected to miss 10 to 14 days, Saad Yousuf of The Athletic reports.
Raffl (lower body) will not return to Friday's game against Detroit.
Raffl scored a goal and blocked two shots in Thursday's 6-5 shootout win over the Panthers.
Raffl cleared the NHL's COVID-19 protocols Monday.