2010-11: Kyle Platzer appeared in eight games for the Waterloo Wolves midget AAA team and was one of the top scorer's for the Wolves' minor midget team. He had 2 goals with 2 assist in for the major midget team. In 30 regular season games for the midget minor team he scored 20 goals with 22 assists and had 20 penalty minutes. He scored 6 goals with 7 assists and had 16 penalty minutes in 13 playoff games. Platzer was selected by the London Knights in the fourth round (65th overall) of the 2011 OHL Priority Draft.
2011-12: Platzer made his OHL debut, skating in four mid-season games with London, and was the leading scorer for the Waterloo Siskins in the Greater Ontario Junior Hockey League. He had 1 assist and was +1 in his brief stint with the Knights. Platzer scored 31 goals with 24 assists and had 70 penalty minutes in 50 games with Waterloo. The Siskins finished seventh in the Midwestern Conference. In six playoff games Platzer scored 4 goals with 6 assists and 6 penalty minutes.
2012-13: Platzer skated in 65 games for London in his first full OHL season. The Knights were the league's top team in the regular season and captured the playoff title; advancing to the Memorial Cup. Platzer scored 5 goals with 17 assists and was +7 with 15 penalty minutes in the regular season. He played in all 21 playoff games and scored 2 goals with 4 assists and was +4 with 8 penalty minutes. In five Memorial Cup games he scored 1 goal with 1 assist and was +1. Platzer was ranked 110th amongst North American skaters in Central Scouting's final rankings and was selected by Edmonton in the fourth round (96th overall) of the 2013 NHL Draft.
Platzer is a smallish center, but he does not let his size dictate his physical play. He is gritty and tough and is always the first one in the corners. He plays with a lot of heart and is often touted as a bit of an underrated player that is overshadowed by a deep talent pool within the London Knights squad.
Platzer finished the 2012-13 regular season with five goals and 17 assists over 65 games in a lower line role for the Knights and went on to gain valuable ice time during the team’s championship playoff run followed up by a Memorial Cup appearance. He will continue with the Knights next year and will look to gain more ice time in a higher-line role as well as experience on special teams. He has a long development curve ahead of him with a good squad and only time will tell if his stats will improve with increased responsibility.