Allen will miss the first 10-to-14 days of training camp due to back spasms, Jim Thomas of The St. Louis Post-Dispatch reports.

EDGE Analysis

With Carter Hutton now in Buffalo, Allen is expected to open the season as the No. 1 goalie for the Blues. He was retained by the Central Division club, despite posting spotty peripherals (2.75 GAA, .906 save percentage) last season, and now this condition further dampens his outlook ahead of a new campaign. Should Allen's injury carry over to the regular season, it will be Chad Johnson preparing for starter's action.