2009-10: Tyrel Seaman skated for the Prince Albert Mintos in the Saskatchewan Midget AAA Hockey League. He scored 12 goals with 17 assists and had 6 penalty minutes in 38 games. The Mintos finished second in the SMHL and reached the second round of the playoffs. In eight playoff games Seaman was the Mintos’ fourth-leading scorer with 9 assists and had 16 penalty minutes.
2010-11: Seaman made the WHL’s Brandon Wheat Kings out of training camp and played for Canada Western in the 2011 U17 World Hockey Challenge. In 52 games with the Wheat Kings he scored 3 goals with 5 assists and was minus-10 with 28 penalty minutes. Brandon finished third in the East Division. In the six-game first round series with Medicine Hat, Seaman scored 2 goals with 1 assist and was plus-one with 2 penalty minutes. Seaman was scoreless in five games for Canada Western, which finished sixth in the ten-team WHC.
2011-12: Seaman was limited to 32 games in his second season with the Wheat Kings due to concussion issues. He scored 6 goals with 13 assists in those games and was minus-10 with 23 penalty minutes. Brandon finished second in the East Division and reached the second round of the playoffs. In nine playoff games, Seaman had 1 assist and was minus-two with 6 penalty minutes. In his second year of draft eligibility, Seaman was ranked 104th amongst North American skaters in Central Scouting’s final rankings prior to the 2012 NHL Draft and was selected by St. Louis in the seventh round (206th overall).
2012-13: Seaman skated in 24 games for Brandon in his third WHL season, suffering a head injury in November and missing the rest of the year with concussion-like symptoms. He scored 3 goals with 5 assists and was +3 with 17 penalty minutes. The Wheat Kings missed the playoffs; finishing sixth in the East Division.
Seaman showed promise as a big, physical center man capable of playing all the forward positions with the potential to become a power forward before concussion issues forced him to retire. When healthy he was a forward that protected the puck well with his body down low, had good speed to fore-check and made devastating body checks in the open ice.
Seaman announced his retirement from hockey in December 2013 after it appeared he wasn't going to be able to fully recover from post-concussion issues. A tough center who played in the dirty areas, he projected as a third line checker with some offensive upside before injuries derailed his career.