Complex sentence: The collection agents found evidence that an intravenous infusion (IV) was administered to Mayweather; his medical team told the agents that it administered 750ml of saline and vitamins via IV to rehydrate Mayweather.
Split into simpler sentences: The collection agents found evidence that an intravenous infusion (IV) was administered to Mayweather. Mayweather's medical team told the agents that it administered 750ml of saline and vitamins via IV to rehydrate Mayweather.