In a brief statement, Roach said his 16-year association with former world champion Pacquiao had been terminated ahead of the 39-year-old fighter's upcoming world title fight with Lucas Matthysse.
Roach said he wished Pacquiao well for the future but had been "hurt" after learning of the Filipino's decision to axe him indirectly.
"Manny and I had a great run for 15 years - longer than most marriages and certainly a rarity for boxing," said Roach.
"I wouldn't trade any of it. Inside the boxing ring and the political ring, I wish Manny nothing but the best.
