Keith hadn't played since leaving a game against Nashville on Oct. 31 after blocking a shot. On Tuesday, he led the team in ice time at 24:35 but was held scoreless and was minus-1 on the night.
Before the game, the Blues honored the late Pavol Demitra in a pregame ceremony. Demitra, and teammates on the Lokomotiv hockey club, died in a Sept. 7 plane crash in Russia. He had several ties to the Hawks.
"It's definitely nice what they are doing here," Marian Hossa said Tuesday morning after practice. "He was a great friend of mine. It's great to be part of something like that and it's definitely going to bring some memories back. It's going to be an emotional start. Pavol is always going to be with us."
Joel Quenneville coached Demitra when the two were in St. Louis.
"It's a sad story," Quenneville said. "Some guys stick out in your mind, you're fortunate to coach."
Jesse Rogers covers the Blackhawks for ESPNChicago.com and ESPN 1000.