Career
He reached the semi finals of the 1978 Winmau World Masters, defeating Doug McCarthy and Charlie Ellix before losing to Tony Brown. Sontag played in the 1979 BDO International World Darts Championship, losing in the first round to Ronnie Davies. He reached the second round of the 1980 BDO International World Darts Championship, beating Rab Smith in the first round before losing to Leighton Rees.
He reached the final of the 1980 Dutch Open, losing to fellow Englishman Brian Fenby.
He returned to Jollees for a third time for the 1981 BDO International World Darts Championship, losing in the first round to American Nicky Virachkul. BDO International
1979: 1st Round (lost to Ronnie Davies 0-2)
1980: 2nd Round (lost to Leighton Rees 0-2)
1981: 1st Round (lost to Nicky Virachkul 1-2).