Sidorkiewicz was drafted by the Washington Capitals in the fifth round, 91st overall, at the 1981 NHL Entry Draft. In 10 games with the Capitals IHL affiliate, the Fort Wayne Komets, Sidorkiewicz had a 4–4–2 record with a 4.37 GAA. He then joined the Binghamton Whalers, the Capitals AHL affiliate that they shared with the Hartford Whalers.
