[22][23] Since the start of the 2008 season, Reginiussen appeared in every match until he suffered a fractured jaw after colliding with Sead Ramović and had to be substituted early, in a 0–0 draw against FK Bodø/Glimt on 11 September 2008.

[28] At the end of the 2008 season, where Reginiussen made twenty–seven appearances in all competitions, he was nominated for the league's defender of the year but lost out to Morten Skjønsberg.

[30] However, the move to Blackburn broke down when Paul Ince, and a transfer to Fulham, with Brede Hangeland and Erik Nevland, was discussed.

[50] In May, Reginiussen admitted that, with Schalke's qualification for the Champions League, and the signing of Christoph Metzelder, yet another centre back, his chances of gaining first team appearances in the coming season were looking slim.

[51] At the end of July, such a move was indeed agreed to, as Reginiussen and Schalke put pen to paper on a one-year loan deal with the newly promoted Serie A club Lecce.

[59] After his transfer move to Odense will take effect on 1 July 2011, Reginussen then scored his first Tromsø for the first time since 2009, in a 3–3 draw against Stabæk, in his last appearance for the club.

[61] He made his Odense BK debut, starting the whole game, setting up a goal for Hans Henrik Andreasen, who scored twice, in a 2–0 win against FC Nordsjælland on 16 July 2011.

[65] It wasn't until on 23 August 2011 when he made his return to the starting line-up, as OB lost 3–0 against Villarreal, losing 3–1 on aggregate of the UEFA Champions League Play–Off Round and was eliminated from the tournament.

[67] After missing one match, due to a finger injury, he scored on his return to the starting line-up, in a 3–1 loss against FC Midtjylland on 26 November 2011.

[76] Since joining the club, Reginiussen became a first team regular for the side, playing in the centre–back position and formed a partnership with Stefan Strandberg.

Ahead of the 2013 season, Reginiussen was chosen by the new head coach Per Joar Hansen as Rosenborg's captain, replacing Mikael Dorsin.

[80] Reginiussen started the first seven matches until he was sent off in the 65th minute for a professional foul in a penalty box, in a 1–0 loss against Sandnes Ulf on 28 April 2013.

[85] Reginiussen helped the side finish second place after Strømsgodset won their match in the last game of the season, with performance earned attention from the Norwegian media.

[88] At the start of the 2014 season, Reginiussen continued to retain his first team place, playing in the centre–back position and formed a partnership with Strandberg, as well as, his captaincy.

[90] After missing one match, he returned to the starting line-up, helping the side keep a clean sheet, in a 2–0 win against Sandnes Ulf on 12 May 2014.

[94] Reginiussen helped the side win four UEFA Europa League Qualifying matches before being eliminated by Karabükspor through away goal.

[105] Reginiussen started the season when he helped the side keep four clean sheets between 19 March 2016 and 16 April 2016; during which, he scored in a 1–0 win against Aalesunds.

[106] Since the start of the 2016 season, Reginiussen regained his first team place, playing in the centre–back position and formed a partnership with Hólmar Örn Eyjólfsson.

[109] Following this, he found himself rotated with Johan Bjørdal, Jørgen Skjelvik and Eyjólfsson in the starting line-up, which saw him placed on the substitute bench.

[118] Two months later on 12 July 2017, Reginiussen scored his third goal of the season, in a 1–1 draw against Dundalk in the first leg of the UEFA Champions League Second Round.

[120] Since the start of the 2017 season, Reginiussen continued to be in the first team regular, playing in the centre–back position, and formed a partnership with Skjelvik and Björdal; earning praises from the Norwegian media for his performance.

[127] Since the start of the 2018 season, Reginiussen continued to regain his first team place, playing in the centre–back position, forming a partnership with Even Hovland.

[131] Reginiussen helped the side qualify for the UEFA Europa League Group Stage after beating KF Shkëndija 5–1 on aggregate; in which he scored in the second leg.

[140] Three days later, Reguiniussen scored an equalising goal in a 1–1 draw against Aalesund in the Round of 16 of the Norwegian Cup; which the club lost on penalty shoot–out.

[161] He then made his first start for FC St. Pauli against Karlsruher SC on 6 March 2021 and helped the club keep a clean sheet, in a 0–0 draw.

[173] During a 1–0 win against South Africa on 10 October 2009, he suffered a concussion after being contacted from the opposition player's elbow and was substituted in the 59th minute as a result.

[176] Two years later, Reginiussen was the national team captain in his last two matches of January, both playing in Abu Dhabi against Moldova and Poland.

[178] After a three years absence, Reginiussen was called up to the Norway national team, appearing as an unused substitute against Northern Ireland on 26 March 2017.

[179] Three months later on 10 June 2017, he made his first appearance for Norway in almost three years, starting a match before being substituted in the 33rd minute, in a 1–1 draw against Czech Republic.

[182] Reginiussen made two more appearances the following year, including a UEFA Euro 2020 qualifying play-offs’ loss against Serbia on 8 October 2020.