After two years in grade cricket, he was selected to make his debut for Western Australia, primarily as a bowling all-rounder in the 1963–64 season.

However, as the WACA Ground was not conducive to spin, and with England left-arm orthodox spinner Tony Lock playing in the team, Jenner rarely appeared in the XI, claiming only 34 wickets in four seasons.

He was recalled for the Seventh, and final Test of the series at the spin-friendly Sydney Cricket Ground, where took 3/42 as England were dismissed on the first day for 184.

[2][4] He was then dropped from international cricket for a season, before being selected to tour the West Indies in 1972–73, playing the last four matches in a five Test series.

He claimed thirteen wickets at 26.7, including career best figures of 5/90 in the fifth Test at Port of Spain, Trinidad, as well as making 38 with the bat without dismissal in the same game.

[2] His first class career continued for a further two years until the end of the 1976–77 season, participating in a two-pronged South Australian attack with off-spinner Ashley Mallett.