The ex-Leeds centre-back has been discussing the former director.
Pearson was brought in by Massimo Cellino as the club's executive director over the summer.
He left after just months in the role, however, with Cellino since sacking another manager - and now claiming he will sell the Yorkshire club to fans.
Matteo told BBC Radio Leeds: "Since he [Cellino] came in, there has been no stability. I feel the young players that we’ve got, it doesn’t help their development.
"I think it’s a great move to get someone in. When Adam Pearson was involved, it was very exciting. When he left, that’s when things started to go wrong again."
Leeds United captain Sol Bamba's thoughts echoed those of Matteo while Pearson was still executive director at the club.
In an interview with the Football League Paper, the Ivorian said Cellino was right to take a step back and praised Pearson for the way he was operating at the club.
A day later, he left Leeds. Whether there is a connection is unclear. Pearson claimed he wanted to focus on running the rugby side he runs but wouldn't he have known how much of a workload he had on his hands when taking the job at Leeds just months before?
Either way, Pearson's exit certainly had the destabilising effect many will have predicted. If Cellino now sells, though, United may be able to return to some sort of consistency. If.