Got rolled in a fight, then butt punched as he turned tail to run. Dunno what's up with the hair loss on the legs. More than likely from persistent travel through some very gnarly stuff.
^^^^^^^ Agree with hair loss on the legs. Lots of travel through tough terrain.
Have seen much worse evidence of fighting than the 'streak' on that buck's side. More often... you see a number of of 'tufts' sticking up on their backs and rear end (where antlers have scraped the hide and hair) but long furrows are not uncommon either, especially if the buck went to the ground and had to get up.
They can take a pretty good licking before outrunning their adversary, or until he quits.