Simplify the following text for a Grade 6 native English-speaking person.
Original: Hans-Hubert `` Berti '' Vogts ( ; born 30 December 1946 in BÃ 1\/4 ttgen ) is a retired German footballer and current manager of the Azerbaijan national team .
Simplified: Berti Vogts ( born 30 December 1946 ) is a former German football player .