Career
He was remarked by former coach Benny Lennartsson as a player with great pace and running ability. Rahmberg started his career at hometown club BK Forward, which were in the second tier and coached by Benny Lennartsson. In 1995, he joined Lyngby Football Club after his previous manager had moved to the Danish club
He played six times at the 1995-1996 Danish Superliga campaign, scoring in his second match against Odense.
He returned to in 1996 joining Allsvenskan club Degerfors IF, located near his hometown Örebro. In first season at the club, he scored 13 goals and was the second best top scored of the 1996 Allsvenskan, only behind Andreas Andersson.
His performance was rewarded with a loan to Premier League side Derby County in January 1997, but he played only 8 minutes for the Rams in the Premier League as a second-half substitute in a 4-2 defeat to Leicester City on 22 February 1997. He had further appearances with the reserve side including a match where a clearance from the field went right into the front window of his car in the parking lot, smashing lieutenant
Rahmberg returned to Degerfors in the same year, but could not avoid the team"s relegation from the Allsvenkan having scored a single goal in the campaign and missing matches due to injury.
In 1999, he joined Raufoss Illinois in the Norwegian First Division. He was the 4th best top scorer in the 2000 Norwegian First Division and joint best top scorer in the 2001 championship. After 11 goals in 17 league matches in 2002, he returned to the top flight and back to with IFK Göteborg.
He suffered a herniated disc early in the 2003 season after falling down after a challenge, failed to recover and decided to retire from professional football.
In 2007, four years after his last professional match, Rahmberg joined amateur club Mellringe Eker IF. Rahmberg was called to the 1997 King"s Cup in Thailand after being the second best top scorer in the 1996 Allsvenskan. He played in all four matches of the tournament as on the tournament, although one of the matches was not considered as a Fédération internationale de football association A-international match.
Club AIK International Individual.