Dickerson committed to the Irish during an unofficial visit Saturday.
"First of all they are getting a great human being, a tireless working, a great citizen, an awesome teammate and a guy maturing to being the unequivocal leader of our team," Walsh said. "It's really refreshing to see. Sometimes guys with all these offers go in opposite directions but that's not the case."
"They're getting a 6-5, 275-pound kid who is energetic, has great feet, long levers, and can play multiple positions on the defensive line," Walsh said. "If you throw on a June 13 practice film, it's like, ‘Wow, who's that guy running around on the field like that? It's Matt Dickerson.' Even Jerry Rice was trying to get better his last few days of the NFL, and he's the same way.
"He can be 6-5, 310 and a real monster. I don't think he's a pure nose. I think he's a 4-technique. He's a really good pass rusher. In a 3-4 scheme, he's a sure-fire 4-technique or rush end."
Dickerson made the expected commitment during his visit, but it was only after his due diligence during the recruiting process.
"I think his mind frame was trying to match the best academic institution with the best football in the country," Walsh said. "He's going to be doing both and it will be his life for the next four or five years.
"He did unofficial visits there and really was just enamored with everything that is Notre Dame. He's a Catholic, Serra is a Catholic school. The Catholic school to Catholic school step was really appealing to him. It meant a lot to him. That was part of the driving force."