Tkachuk, a Boston native, was a four-time United States Olympian and silver medalist at the 2002 Winter Games. Among American-born players in NHL history, the five-time All-Star ranks second in goals (538) and fifth in points (1,065).
A number of the current Blues, including B.J. Crombeen, remember what it was like learning to be a pro under the watchful eye of a player likely destined for the NHL Hall of Fame as well.
"It was a great honor to even be able to play with a guy like that," Crombeen said of Tkachuk, who played in 542 games with the Blues, recording 208 goals and 219 assists. "You look at the history he's had, everywhere he's went, he's been successful.
"It was pretty neat for me as a young guy to come in and have a guy like that to look up at and see how he plays the game and how he gets ready every day. It's exciting for all the people here in St. Louis. It's neat that he gets honored in a way like he is tonight."
Vladimir Sobotka, who was acquired by the Blues from the Bruins in 2010 for the rights to Boston native and defenseman David Warsofsky, will face his former teammates for the second time since the trade.
Sobotka, who has 3 goals and 17 points in 50 games this season, scored in his first game against the Bruins a season ago, a 2-1 Blues shootout win at TD Garden.
"He's a good fit for us, just like he was in Boston," Blues coach Ken Hitchcock said of Sobotka. "He was a versatile guy in Boston, moved him up and down the lineup. ... He's one of those guys that's an underrated player, kind of a glue guy for the hockey club. He fits the way we play. You're trying to build a work ethic, you're trying to build a kind of an edge to your game. He's a tough little guy. That's exactly what we need.
"I think where he helps us is that when we get in trouble injury-wise or we get down roster-wise, he's a guy that can step up in the short-term and play up in the lineup, just like he is right now."
Sobotka will move up and play on the Blues' top line tonight with David Backes and T.J. Oshie.
"It's a good fit for us because he takes a lot of the left side faceoffs for David," Hitchcock said. "That helps, so they start with the puck more. He's a smart player. He knows how to manage the game properly. He's good on the forechecks. To me, he's a lot like (Chris) Kelly is or (Rich) Peverley is for Boston. He's able to move up and down the lineup and be productive. We'd like him to hit the net more. He's wearing out the glass in some of the buildings, but if we can get him hitting the net a little more, he'll be alright."
The Blues (36-16-7) will go back with Carlo Colaiacovo tonight after the defenseman missed the previous three games, including one with a right wrist injury.
Kent Huskins, who returned to play three games following a fractured bone in his left ankle, will sit out.
"One thing we didn't read was missing so many games for Husky because he was good, and then he hit the wall," Hitchcock said. "This is a way to regroup and get the energy back going getting ready for this weekend."