The concept of "co-captains" has become gradually more fashionable in first-class rugby within the last decade or so.
Though certainly not universally adopted - some coaches and observers steadfastly insist, with some merit, that the buck should still stop with one person on the park - the principle is far from uncommon.
Back in 2016, a notable domestic case was then-Stormers head coach Robbie Fleck naming midfielder Juan de Jongh and tighthead prop Frans Malherbe as co-leaders for the Super Rugby campaign.