One word....TRUE. Wrestlers have great stamina and I know of one that Lake prolly doesn't even know hes a distance runner. Payton Morrison. And no I am not his dad.
Upper weights good throwers, little guys make great distance-mid distance, middle weights make good pole vaulters and sprinters. What I am getting at is that wrestlers are great athletes period because it offers something for everyone who is willing to work. Track also offers something for most people.
I would encourage every wrestler to at least try track/XC.