The latest came on Saturday evening in Chicago when champion Dillashaw defeated Barao in the same fashion as their first fight, a TKO.
This time around it was a quicker finish.
Just over 30 seconds into the fourth round, with Barao backed into the fence Dillashaw swarmed him with a myriad of punches to the face and the fight ended via stoppage from referee Herb Dean.
Dillashaw needed just about the same amount of total strikes for this fight, 168, than he did their first fight, 169.
Barao had significantly less total strikes on Saturday, 65.
Dillashaw has now defended his title belt twice since taking it from Barao in UFC 173.
He first defended his belt against Joe Soto at UFC 177 winning via TKO in the fifth round.
The fight was a quick turnaround for Dillashaw, only three months after winning the title.
Dillashawâ€™s next opponent may be prior bantamweight champion Dominick Cruz, but not until he gets healthy enough to get in the cage.
Cruz suffered a knee injury that has kept him out of the octagon this year.