Joshua Lee Grajczonek (born 5 February 1990) is an Australian former motorcycle speedway rider.

Born in Townsville, Queensland, Grajczonek's big break in British Speedway came as an 18-year-old with the Glasgow Tigers.

During four years with the team he won his first major trophy as a Speedway rider, the 2011 Premier League.

[5] After spells with both the Belle Vue Aces and the Swindon Robins in the Elite League, Grajczonek experienced two successful years riding for the Poole Pirates.

However, after an unfortunate injury to fellow Australian Davey Watt shortly before the start of the season Poole turned to Grajczonek and drafted him in as a temporary replacement.