Defensive backs coach Rocky Seto was not the only one to break the news to Armstead, head coach Pete Carroll also spoke with the standout defensive lineman about the big news.
"Later on I talked to coach Carroll," he said. "He let me know that he wants me to play defensive end or defensive tackle. It was a really good talk, and he just let me know that he wanted me to be a Trojan."
Although Armstead did not commit to the Trojans, he does have them sitting at the top of his list.
"USC is my number one choice right now," said Armstead. "I told Texas A&M, Arizona, Arizona State and Fresno State that I would visit before I made a decision. I want to honor that promise, so I told Coach Carroll and he is fine with that."
The offer was recognition of Armstead's hard work and determination, interestingly enough, he was not receiving much recruiting attention from the Trojans a few months back.
"I am just excited and relieved that all of my hard work has paid off," he said. "A few months ago I wasn't getting much mail from USC, and I decided that I wanted to change that. So I went down to the camps and proved what I could do. It really just goes to show that just because a school is not recruiting you, you can still work hard and earn an offer from the school you love."
Armstead had primarily been mentioned as a defensive tackle, so the recent news about playing defensive end came as some what of a surprise to the Elk Grove star.
"I'm open to playing anywhere on the defensive side of the ball," he said. "I just want to produce and help the team out anyway I can. It doesn't matter where I play on defense really."
Armstead has done his research on all of the schools he is considering, and feels that the current depth chart on the USC roster works in his favor.
"I looked at the depth chart at USC already," he said. "Coach Carroll also told me that there are four seniors leaving after this year, so the opportunity for me to come in and play is there. I don't think their plan is to redshirt me. If I go in there (to USC) and work hard, I can come in and play."
Armstead is attracted to much more then the depth chart at USC, and set aside a few reasons why the Trojans are the team to beat for his services.
"Coaching is the number one thing that makes them (USC) stand out," said Armstead. "If I go to USC, they'll make me the best player I can be. I also love the campus, and you can't beat a USC education. They have a winning tradition, there's nothing about USC I don't like."
Armstead is in the process of planning visits for the fall, and Trojan recruiting fans can expect to see more of the defensive lineman over the next couple months.
"I can't get enough of USC," said Armstead. "I'm going to visit the four schools I promised to visit, and then I will make my decision on my birthday, August 3rd. Whatever school I commit to I will officially visit."
Although Armstead earned the offer he was looking for, he knows he still has plenty of work left to achieve the lofty goals he set for himself and his senior season.
"I want to be one of the top five players at my position," he said. "I want to be a five-star prospect. I also want to be All-Selection and All-State, and make the Army All-American Game in San Antonio."
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