As well as 129 first class matches for New South Wales he played in 24 Tests between 1920 and 1928.

[1] His best bowling was 7/69 in an innings and 8/101 in a match at the 1920/21 Test against England at the MCG.

[1] At the Johannesburg Test in 1921 he scored a century from 67 balls in 70 minutes, which was at the time the fastest hundred in terms of both balls faced and minutes taken in the history of Test cricket.

[2] Jack was the nephew of two of the very early Australian cricketers, Dave and Ned Gregory.

A knee injury suffered in the 1928 Brisbane Test match brought his cricket career to an abrupt finish.