[2] Collingwood won the preliminary final, over North Melbourne, but Dreher lost his place for the grand final to Stan Magro, who was returning from suspension.
[2][4] During the 1981 VFL season Dreher was almost part of the trade that saw Warwick Irwin go from Fitzroy to Collingwood.
[5] Dreher and teammate Des Herbert, along with over $60,000, were to be given to Collingwood, but he was replaced in the deal by Leigh Carlson.
[2][4] His last appearance for Collingwood was their round 20 loss to Melbourne, his seventh game of the season.
[2] He went to West Adelaide in 1983 and was a centre half-back in their premiership team that year.