 Hancock has appeared in all but one of the Grand Prix series, since its creation in 1995, missing the 2019 series to care for his wife during her battle with breast cancer and he has been included on the provisional entry list for every Grand Prix series until 2020.He rode for the Swedish team Rospiggarna for 15 years, He rode for Piraterna from Motala, Sweden between 2010-2017, before joining Dackarna from Målilla, Sweden in 2018.After a one year hiatus due to his wife suffering from breast cancer Hancock signed for Clubs in Poland and Sweden and was given a 'permanent wild card' into the 2020 Grand Prix Series but after talking about his return with Hancock his son Wilbur said it would be difficult for Greg to return to speedway at the level he was racing when he took his break.