IMoO/loot_tables/entities/ravager.json

{
  "pools": [
    {
        "rolls": 1,
        "entries": [
            {
                "type": "item",
                "name": "minecraft:saddle"
            }
        ],
        "conditions": [
            {
                "condition": "killed_by_player"
            }
        ]
    }
  ]
}