2005-06: Among the top defensemen in the Swedish juniors this past season scoring 15 points in 29 games for Frölunda in the J20 Superelit league. He also made his SEL debut with the Indians, but was held scoreless in 15 games.
2006-07: Had a successful season with Frolunda in the SEL. Played for Team Sweden at the WJC.
2007-08: Played his second season with the Frolunda Indians in the SEL. It was a rough year for the team, but he found room to grow. Posted seven points (3 goals, 4 assists) in 51 games for the Indians. At the conclusion of the season, Jonas Ahnelov signed on with the Coyotes as expected.
2008-09: In an injury filled North American debut, Ahnelov posted 1 goal and 6 assists through 46 games with the San Antonio Rampage.
2009-10: In another injury riddled season, the defensemen posted 1 assist in 11 games.
2010-11: Ahnelov skated in 42 of 80 games for the AHL's San Antonio Rampage after missing all but eleven games the previous season due to a serious shoulder injury. He finished with 2 goals and 2 assists and was -4 with 10 PMs in a limited role. Ahnelov signed a contract in June 2011 to play for MoDo in Sweden's Elitserien for the 2011-12 season. He was tendered a qualifying offer by the Coyotes in July 2011, making him a restricted free agent.
2011-12: Ahnelov returned to Sweden to skate for MODO in the Elitserien. After spending much of the season with Jens Westin on MODO's third pairing, Ahnelov finished the year playing alongside one-time Columbus Blue Jacket Ole-Kristian Tollefsen on MODO's top defense pair. Ahnelov scored 2 goals with 9 assists in 54 games and was an even plus/minus with 16 penalty minutes; averaging 20 minutes of ice time per game. MODO, which finished eighth, lost to Skelleftea in a six-game quarterfinal playoff series. Ahnelov was minus-one with no points nor penalty minutes in the series.
A very physical defenseman with great size and strength. Possesses a powerful stride and tremendous lower-body strength. Ahnelov is a rambunctious player which can be both good at bad.
Is tough to stop at full speed but doesn’t really have great quickness.
After a promising start to his career, Ahnelov has battled injuries the past few years and has fallen down the depth chart. With all of the young talented defensemen in the system it won’t be easy for Ahnelov to be able to see any NHL time; at least with the Coyotes. He has returned to Sweden and is currently playing for MODO.