This post contains D&D 5E rules that can be used to adjudicate attempts to ride rodeo-style bucking animals like one of the Bulls of Crete at the Megalos Ellada farm, one of the places described as part of Skirmisher Publishing’s “In the Footsteps of Hercules” universal sourcebook!
Characters in the playtest group for Skirmisher Publishing's "In the Footsteps of Hercules" universal sourcebook kept running into a bunch of rambunctious young athletes who play a rugby-like ball game called "harpastum" that was popular throughout the Classical world.