2007-08: Dennis Everberg appeared in 24 games with Rogle BK's U18 in southwest Sweden as a 16-year-old. He scored 3 goals with 4 assists and 49 penalty minutes.
2008-09: Everberg played in 12 games for Rogle BK's U18 team. He scored 2 goals with 7 assists and 36 penalty minutes.
2009-10: Everberg was one of the youngest players in Sweden's Elitserien — playing in 12 regular season games and all eight Kvalserien relegation playoff games for Rogle's last place men's team. He provided scoring and physical play with Rogle BK's U20 team and skated in three games for Sweden's U19 team. Everberg scored 1 goal with 1 assist and was minus-1 during the Elitserien regular season and had no points nor penalties in eight Kvalserien games. Rogle was demoted to Allsvenskan after finishing third in the six-team tournament. Everberg scored 6 goals with 12 assists and 55 penalty minutes in 36 regular season games for the Rogle BK U20 team and scored 1 goal with 2 penalty minutes in two playoff contests. He scored 1 goal with 31 penalty minutes in three games for Sweden's U19 team.
2010-11: Everberg played 41 regular season games and all eight Kvalserien games for Rogle's men's team in his first full pro season. He scored 5 goals with 7 assists and was +2 with 18 penalty minutes during the regular season as Rogle finished second in Allsvenskan. The Angelholm-based club failed to return to Elitserien; finishing fourth in the Kvalserien. Everberg was minus-4 with no points and 2 penalty minutes in eight post-season games. In 19 games with the Rogle U20 team, including one playoff game, he scored 5 goals with 3 assists and 56 penalty minutes.
2011-12: A serious shoulder injury wiped out most of Everberg's second season in Allsvenskan with Rogle but the 20-year-old played a key role in the club's successful run in the Kvalserien. He had no points or penalties in five regular season games as Rogle finished fifth in the regular season but reached the Kvalserien. Everberg scored 2 goals with 4 assists and was +4 in 10 post-season games as Rogle finished second to Timra IK to gain elevation to the Elitserien for 2012-13. Everberg played three games with Rogle's U20 team and had 4 assists with 2 penalty minutes.
2012-13: Everberg played in all 55 games on a Rogle team that was overmatched in its return to Sweden's Elitserien; winning just 15 games and finishing last in the regular season before being relegated to Allsvenskan after a fifth-place finish in the Kvalserien. Everberg scored 5 goals with 3 assists and was -14 with 47 penalty minutes during the regular season and was -1 with 1 assist in ten Kvalserien games.
2013-14: Everberg led Rogle BK with 17 goals and was the club's third-leading scorer during the Allsvenskan regular season. He was signed by the Avalanche as an unrestricted free agent after scoring eight goals in 16 post-season games. Everberg had 17 assists and was -2 with 30 penalty minutes in 47 regular season games. Rogle was seventh in the regular season but was 4-2 in the playoff series to reach the Kvalserien; just missing elevation to the re-christened SHL after finishing third. Everberg scored 8 goals with 3 assists and was +7 with 12 penalty minutes in 16 post-season games and signed a two-year entry-level contract with Colorado in April 2014.
Colorado signed Everberg to a two-year, entry-level contract on April 30th, 2014