Boris Mironov began playing for Moscow CSKA at the age of 16 and represented Russia at two World Junior Championships (1991-1992) before making his NHL debut during the 1993-94 season.
Mironov was the Winnipeg Jets second choice, 27th overall in the 1992 NHL Entry Draft while still playing in Russia. Mironov wanted to follow in the footsteps of his older brother Dmitri, who joined the NHL in 1992 with the Toronto Maple Leafs.
In 1993-94 Mironov played 65 games, scoring seven goals and 29 points. He was then traded to the Edmonton Oilers with Mats Lindgren, a first-round draft pick who turned out to be Jason Bonsignore. Mironov played in Edmonton for more than five years establishing a career high in goals (16), assists (30) and points (46) before being traded to the Chicago Blackhawks in the latter stages of the 1998-99 season.
Upon his arrival in the Windy City, Mironov continued his strong play on the Blackhawk blueline, despite missing action due to injury. After a little over three season with Chicago, Mironov was traded to the New York Rangers in January, 2003.
Aside from his appearances at the World Juniors, Mironov went on to represent his homeland at the World Championships (1996 and 2000) and the Winter Olympics (1998 and 2002).