5 fights is a strech dan, how many guys do you see five fights in to there career contending for a top tier title? at most I'd say he has 8 or so fights before becoming a true contender. 4 outside of the UFC, then 3-4 fights in UFC to get to the top of the heavyweight crop there which is stacked beyond belief.
Hell guys like Michael Bisping arn't even contenders yet and there barely cracking the surface in the UFC right now talent wise(Joker vs Bisping almost confirmed for UFC 75 btW Dan
).