Jonathon Gregory Blum (born January 30, 1989) is an American professional ice hockey defenseman, currently playing with EHC Red Bull München of the Deutsche Eishockey Liga (DEL).

[4] Due to the lack of elite minor hockey competition in California, the team travelled to Canada and the Northeast United States to play in top-level tournaments.

A few months prior to his first training camp in Vancouver and still a freshman at Trabuco Hills High School,[3] his family's house caught fire from a gas leak on April 2, 2004, killing his twin sister, Ashley.

Shortly after, his mother was diagnosed with a form of juvenile cancer, which almost caused Blum to opt not to leave for Vancouver to be close to family instead, but he went at her urging to continue on his hockey path.

[9] Blum also participated in the CHL Top Prospects Game along with teammates Tyson Sexsmith, Michal Repik and Spencer Machacek.

Then, facing the Tigers in the Memorial Cup final Blum and the Giants captured the franchise's first Canadian Hockey League (CHL) title by a 3–1 score.

[24] Nearly a week later, however, he was sidelined with a shoulder injury after receiving a couple of hits from Kelowna Rockets forward Jamie Benn in a 3–2 overtime loss.

[25] Blum returned to complete the season with 66 points in just 51 games to finish third in league scoring among defensemen behind teammate Brent Regner and Paul Postma of the Calgary Hitmen.

Despite missing 21 games, Blum was named to the WHL West First All-Star Team, along with teammates Casey Pierro-Zabotel and Evander Kane,[26] and won the Bill Hunter Memorial Trophy as the league's top defenseman.

Upon the Giants' elimination, Blum was assigned by the Predators to their American Hockey League (AHL) affiliate, the Milwaukee Admirals, for the remainder of their 2009 playoff run.

[31] Blum appeared in his first NHL game on the night of his first call-up, registering a -1 plus-minus rating in 16 minutes of ice time; the Predators lost 4–0 to the Columbus Blue Jackets.

[34] Remaining with the Predators for the remainder of the campaign, Blum recorded 3 goals and 8 points over 23 NHL games while averaging 17 minutes and 45 seconds of ice time per contest.

[35] Making his Stanley Cup playoffs debut in Game 1 of the opening round against the Anaheim Ducks, Blum helped the Predators to a 4–1 win with one assist.

[40] On August 8, 2015, as a restricted free agent with the Wild, Blum confirmed he had signed a contract with Russian club, Admiral Vladivostok of the Kontinental Hockey League.

Having completed the 2018–19 season Blum left Dinamo Minsk and the KHL, opting to sign his first contract in Sweden in agreeing to a two-year deal with Färjestad BK of the SHL on July 1, 2019.