Blues forward Vladimir Tarasenko will have surgical treatment on his left shoulder and be out at least five months.
General supervisor Doug Armstrong revealed the relocation Monday and said the procedure will be carried out Tuesday on the Russian star, who has been put on long-term hurt reserve.
Tarasenko left last Thursday's 5-2 win over Los Angeles after getting tangled up with Kings defenceman Sean Walker with about 6 minutes left in the first period. He did not travel with the group for weekend games at Boston and Detroit.
Tarasenko has three goals and 7 assists in 10 video games this season for the protecting Stanley Cup champ Blues.