John (Jack) Parker (1905 – 1989) was an international motorcycle speedway rider who made his debut at the Whitsun meeting at High Beech in 1928.

[4] He took part in some of the earliest dirt-track races at High Beech, initially riding a stripped-down road bike, but later a specially adapted BSA.

The team relocated mid-season to Lea Bridge (becoming Clapton Saints), and Parker captained England in three test matches that year.

He won the 1938 Australian Championship at the Camden Motordrome in Adelaide, defeating Cordy Milne and Frank Woodroofe in the 5 lap final.

During his time in Australia, Parker was also a regular captain of the England team in test matches against the Australians (who included such riders as Lionel Van Praag, Bluey Wilkinson, Jack Young, Aub Lawson and Vic Duggan).

[7] Parker was involved in a car crash in Australia during the 1951/52 season which left him seriously injured, and he never regained his top form.