Jaromír Jágr is a Czech professional ice hockey right winger and owner of Rytíři Kladno of the Czech Extraliga (ELH). He previously played in the National Hockey League (NHL) for the Pittsburgh Penguins, Washington Capitals, New York Rangers, Philadelphia Flyers, Dallas Stars, Boston Bruins, New Jersey Devils, Florida Panthers and Calgary Flames, serving as captain of the Penguins and the Rangers, between 1990 and 2008. After leaving the Rangers in 2008, he played three seasons in the Kontinental Hockey League (KHL) with Avangard Omsk. He returned to the NHL in 2011 with the Flyers and remained in the league for seven more years before being assigned by the Flames in 2018 to HC Kladno. Having played in 37 professional seasons and over 2,000 professional games, Jágr has had the longest playing career in professional ice hockey history. He is the most productive European player who has ever played in the NHL and is widely regarded as one of the greatest players of all time.

Rytíři Kladno is a Czech professional ice hockey team based in the city of Kladno. They are currently a member of the Czech Extraliga. The team president and owner is Jaromír Jágr, a former NHL player, who is currently playing in home games for the team in addition to his ownership and administrative roles. The team plays its home games at ČEZ Stadion.