Half-rocs are a combination of Orc and Human. Whether by force or choice is anyone's guess. They tend to bigger than the average human, from 6'0" to 7'6". They tend to have a heavier build and non human features from tusks to sloping forheads.
Half-orcs get a +1 to strength and -1 to dexterity. Half-orcs can be any class except mage.