 He served in the Kent Fortress Royal Engineers in the First World War and died as a result of injuries received during his service in August 1918.Jennings made his first-class cricket debut for Kent in August 1909 in a County Championship match against Surrey at The Oval.This was his only appearance in the Kent Championship winning side of 1909 and it took until 1912 for him to make more than three appearances in a season for Kent, a County with a particularly strong batting lineup at the time.