ST. LOUIS - Blues forward Alexander Steen has been placed on injured reserve with a concussion.
He will be out indefinitely.
Blues General Manager Doug Armstrong made the announcement during the team's morning skate on Saturday at Scottrade Center.
"I say indefinitely because it could be day-to-day or week-to-week with a concussion," Armstrong said. "There's no set time table."
Steen last played on Dec. 21 against Edmonton. He left the game in the second period and did not return. The injury is believed to be a result of multiple hits sustained from the Dec. 16 (Ottawa), Dec. 19 (Montreal) and Dec. 21 (Edmonton) games.
Steen traveled to see a specialist prior to the team placing him on injured reserve.
"What we wanted to do before we made any announcements, we wanted to give [Steen] some time to rest," Armstrong said. "We're going to want to take our time. We're hoping that it's not a long-term thing."
Steen leads the Blues with 24 goals and 35 points. He ranks second in the league in goals (24) and game-winning goals (6). Currently in his ninth NHL season and sixth as a Blue, Steen has totaled 341 points (147 goals and 194 assists) to go along with 248 penalty minutes in 572 career games.
The Winnipeg, Manitoba native was originally acquired by the Blues from Toronto via trade in 2008.