No need - the normal diet provides enough. Athletes who consume more energy will naturally be getting more protein. In addition, if the additional protein is gained through the diet, then additional Vit. B, iron and zinc are likely to be taken in also. Make sure the protein is of sufficiently high quality and that there is sufficient energy being consumed. People with kidney disease -avoid excessive protein.
Protein produces diuresis and additional water needs to be consumed.
It is also possible that excessive protein intake can reduce calcium retention. Tryptophan is a precursor for 5 HT synthesis. It competes with the BCAAs to cross the blood-brain barrier. Prolonged exercise sees an increase in BCAA uptake by the muscles and a decrease in plasma concentrations. There is believed to be an increase in tryptophan entry to the brain and a greater risk of fatigue.