O'Reilly led the NHL in face-offs won (1,274) last season,and his 59.98 face-off win percent was second in the NHL to Anaheim Ducks center Antoine Vermette among those who took at least 200 (60.00).
O'Reilly had 61 points (24 goals, 37 assists) in 81 games. Bozak had 43 points (11 goals, 32 assists) in 81 games for the Toronto Maple Leafs. Perron had an NHL career-high 66 points (16 goals, 50 assists) in 70 games for the Vegas Golden Knights. Johnson was 10-16-3 with a 3.55 goals-against average and .891 save percentage for Buffalo.
"Obviously we know what Perron brings, but O'Reilly and Bozak, we know they're two-way players," Pietrangelo said. "Having played against them, I know how good they are on the defensive side. They're very, very difficult to play against."
The Blues ended last season with Brayden Schenn, Kyle Brodziak, Sobotka and Oskar Sundqvist as their top four centers. Schenn, O'Reilly, Bozak, Robert Thomas (chosen No. 20 in the 2017 NHL Draft) and Ivan Barbashev make up the group for 2018-19.
"I think a big element that we were missing that we've added now is face-offs," Pietrangelo said. "Not only are you just bringing in face-off guys, you've got a right-handed [Bozak] and a left-hand (shot, O'Reilly). That may be another element that goes unnoticed to the normal eye, but that's a big, important thing for us knowing you have a guy that can go win a face-off on both sides of the ice. It's good to see that we've addressed those needs and I'm excited to see these guys up the middle because they want to take care of the defensive end just as much as they want to score goals, which I think is championship hockey."