The Flyers forward, who resides in Kladno, about 16 miles northwest of Prague, got the loudest response from the crowd at the end of Philadelphia's practice.
Voracek also used the event as a way to help his charity Kluk Puk -- "Lucky Puck" in Czech -- which aims to fight multiple/disseminated sclerosis. He hosted 93 MS patients and their family and friends at the arena (he wears No. 93) and met with them after practice. Voracek's sister Petra, who is battling the disease, and other members of the Voracek family were also at the practice.
After practice, Voracek signed a jersey and teammates Claude Giroux and Carter Hart donated autographed gear that will be auctioned to raise money for the foundation. The NHL also made a $25,000 donation to the foundation.
"It means a lot, obviously, you know, it's those kinds of moments, and sports especially, that brings people together," Voracek said. "That's why we started a foundation. That's why we are doing that. I'm glad they get the chance. And with NHL help, we made it happen. So, it's always a lot of fun to see your family around."
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The atmosphere, different from an off-day practice in North America, struck a chord with several players.
"It was awesome, and [the reaction for] Jake at the end, it shows how much they love hockey over here, how excited they are that they get to see a live NHL game, a live NHL practice," Flyers defenseman Justin Braun said. "The excitement is there. Really cool to be part of it."
Throughout the afternoon, fans took photos of players from the Flyers and Blackhawks. Youth hockey players chanted throughout the practices. Tommy Hawk, the Blackhawks mascot, threw T-shirts to fans during Chicago's practice.
"I've never seen that many people for a practice before," Blackhawks forward Dylan Strome said. "It's fun. Obviously, they love hockey, so it was nice to see. There should be a lot of people tomorrow and a pretty loud crowd, so I'm looking forward to it."