Career
The 6 ft 4in (195 cm) center was drafted by the Sudbury Wolves in 1984. He joined OHL club after a spectacular offensive season with the New Jersey Rockets of the USAHA where he netted 94 goals and 168 points in 58 games as a 16-year-old. In 63 games with the Wolves in his rookie year he produced 16 goals and 44 points along with a noticeable willingness to play a rough and tumble game, with 106 minutes in penalties.
The Quebec Nordiques selected him in the third round of the 1985 National Hockey League draft, 57th overall.
He played parts of three National Hockey League seasons in Quebec before going to the Edmonton Oilers in the 1990-1991 campaign. Despite being selected in Round 3, Middendorf had only played 13 games in the National Hockey League, collecting 2 goals and 4 assists.