2007-08: Joel Edmundson was chosen in the sixth round, 121st overall, of the 2008 WHL Bantam Draft by the Moose Jaw Warriors.
2008-09: Edmundson skated for the Brandon Wheat Kings Midget AAA team.
2009-10: Edmundson played for the Brandon Wheat Kings midget AAA team in the MMHL. In 44 games, he scored 10 goals and added 35 assists for 45 points to go along with 54 penalty minutes. In 7 playoff games, he notched 5 assists.
2010-11: In his WHL rookie season, Edmundson played in 71 games for the Warriors. He scored 2 goals and added 18 assists for 20 points while adding on 95 penalty minutes.
2011-12: Edmundson provided both toughness and supplementary scoring for Moose Jaw in his second season of junior hockey. The Warriors finished first in the WHL’s East Division yet had six players with 80 or more penalty minutes. Edmundson was plus-13 with 4 goals and 19 assists in 56 games and his 91 penalty minutes were fourth-most on the team. Moose Jaw reached the playoff semifinals and Edmundson was plus-2 with 3 goals and 2 assists and had 12 penalty minutes in 14 playoff games.
2012-13: Edmundson went from struggling Moose Jaw to playoff-bound Kamloops in a January trade in his third WHL season. The move seemed to spark both the Blazers and Edmundson as his experience solidified a young defense corps and Edmundson finished with 17 points in his last 34 games after scoring 2 goals with 6 assists in 29 games for Moose Jaw. In 63 games between the two teams he scored 9 goals with 16 assists and was minus-2 (plus-9 with Kamloops) with 141 penalty minutes. Kamloops reached the Western Conference finals after finishing second in the B.C. Division. Edmundson scored 3 goals with 5 assists and was plus-2 with 29 penalty minutes in 15 playoff games. He signed a three-year entry-level contract with St. Louis in March, 2013.
2013-14: Edmundson played for the Blues’ rookie team in the Traverse City Tournament before skating for St. Louis AHL affiliate Chicago as a 20-year-old in his first pro season. In 64 regular season games for the Wolves he scored 4 goals with 4 assists and was plus-4 with 108 penalty minutes (second only to team leader Cody Beach, 109). The Wolves finished first in the Midwest Division and advanced to the second round in the playoffs. Edmundson had no points and was minus-3 with 16 penalty minutes in five playoff games.
Edmundson has good size, but will have to improve his foot speed. Goaltenders will love him, as he is capable of physically clearing the area in front of his own goal. He is a tough defender that can deliver devastating body checks but still needs to improve his angling, reverse pivoting and gap control. He's starting to show some offensive upside to his game, makes a good first pass up the ice and possesses a hard, heavy shot from the point.
Edumundson was assigned to St. Louis AHL affiliate Chicago at the start of the 2014-15 season but as of the start of December had yet to appear in a game due to a back injury. With a strong physical component to his game any injury of this type could cast shadows over his long-term future. Projection-wise, assuming he is able to make a full recovery Edmundson could grow into a potential top-four defenseman at the NHL level but he will have to fight for a spot with the AHL club upon his return.