 Erb was injured six games into his first season at Aachen, and had to sit out the remainder of the season, which ended in his second consecutive relegation.Aachen were relegated in the 2012–13 season as well, so Erb left the club in summer 2013, returning to Munich to sign for SpVgg Unterhaching.In the summer 2015, Erb joined Rot-Weiß Erfurt 

Erb has represented the Germany youth team at under-17 to under-20 level, and played in all seven matches as the team finished third at the 2007 FIFA U-17 World Cup.