Yadav who was in an Uttarakhand jail was arrested by the local police on a production warrant issued by a city court, said a senior police officer.
Yadav, also a former UP government minister was brought here by Uttarakhand police team and his custody was handed over to north east Delhi Police, said the officer.
The betting racket was busted in Bhajanpura area in August last year.
Ten persons were arrested by the police in connection with it and the accused had alleged that Yadav was extending "protection" to the racket, added the officer.