Primarily an AHL player, Mike Siklenka was born on December 18, 1979 in Meadow Lake, Saskatchewan. The rugged former Seattle Thunderbird (Western Hockey League) was originally drafted by the Washington Capitals in the fifth round, 118th overall of the 1998 NHL Draft.
The massive-framed Siklenka (six-foot-five, 240 pounds) played both defense and right wing at different junctures of his career. As a forward, he was used as a grinding winger at even strength and as a net-front power play player. On the blueline, he was cast as a physical defensive defenseman. He was also willing to drop the gloves as needed, regardless of the other details of his role.
The Flyers signed Siklenka as a free agent on January 27, 2003, assigning him to the Philadelphia Phantoms after a one-game stay with the big club. He skated seven shifts and 4:26 worth of ice time in a 3-0 home loss to the Tampa Bay Lighting, recording one shot on goal. It would be his lone NHL game as a Flyer.
After losing him on waivers to the New York Rangers on October 3, 2003, the Flyers reclaimed Siklenka on November 5 after the Rangers waived him. Before returning to the Flyers' organization, he had a one-game NHL cup of coffee with the Rangers.
Overall, Siklenka spent 82 games with the Phantoms over parts of two seasons, posting seven goals, 18 points and 198 penalty minutes. He also had a one-game stay with the ECHL's Trenton Titans, scoring a goal. On February 14, 2004, the Flyers traded Siklenka to the Dallas Stars organization in exchange for forward Steve Downie.
In 2004-05, Siklenka continued his career in Europe, going on to spend most of the next decade playing overseas primarily in Austria.