I really don't know the guy who is fighting Baroni.
People say he is legit, whatever.
He is definatelly not very well known, nor did he beat anyone who is well known.
When Charuto got to UFC he just beat Castilio.
I'm sure there would be penty of deserving fighters ready to go against Baroni in UFC.
Just a short list
phillip miller (if he is still fighting)
The list goes on and on and on.
The last guy who came in with 4-0 record against nobodies didn't do so well against St. Pierre.
not that the guy they chose is bed, it's just that there are many,many much better guys.