"He hasn't played yet, so it's a good time for him," Blues Head Coach Craig Berube said. "He's worked hard, he's had a good camp and we want to play him. He's going to play a lot of games for us.
Thursday's game will be Allen's 13th consecutive road start dating back to last season. In his last 12 starts, Allen posted a 2.21 goals-against average, a .927 save-percentage and two shutouts.
With a win, Allen would tie Curtis Joseph for second on the Blues' all-time wins list for goaltenders (137).
In addition, Robert Bortuzzo will return to the lineup Thursday, replacing Carl Gunnarsson. During the morning skate in Ottawa, Bortuzzo skated on a pairing with Vince Dunn, while Justin Faulk moved up to the top pair with Alex Pietrangelo.