The club, again as the Dolphins, returned to the tier-three Regionalliga from 2000 onwards, playing the next three seasons at that level. At the end of the 2002 season it withdrew from league football and restarted again in the Verbandsliga in 2004. Two unbeaten seasons in 2004 and 2005 took the team back to the Regionalliga, where it played for the next nine seasons from 2006 to 2014. It won league championships at this level in 2008 and 2014, remaining unbeaten on both occasions. In 2008 it missed out on promotion when it lost to the Hildesheim Invaders in the promotion round but, in 2014, a draw against the Osnabrück Tigers followed by victory over the Potsdam Royals took the club back to the second tier after a fourteen-year absence.
