According to St. Brown, the schools making the cut all have three factors including great education, a good football program, and an NFL tradition.
The Southern California native has only taken two unofficial visits to date, to USC and Stanford, and says he will "for sure" take some official visits later in the year.
"Stanford I went up there for the camp and then the next day I went around the campus."
St. Brown, a self-describing "tall, big, and fast receiver" and rightfully so at 6-foot-5 195-pounds, says there isn't one program in his list of five who is standing out as recruiting him the hardest.
The No. 18 rated receiver in the 2015 class, St. Brown broke down each of his five favorite programs:
USC: "I talk with Tee Martin the receivers coach. I like USC because they have a lot of connections in SoCal, education, and they send a lot of guys to the NFL."
Stanford: "Stanford is just Stanford. It speaks for itself. Great school."
Tennessee: "Tennessee is a great football program, they send a lot of guys to the NFL and it just seems like a good school for me."
Notre Dame: "Notre Dame is awesome, same thing. Great education, good school, and they send a lot of guys to the NFL."
Northwestern: "Northwestern has a really good education and the football team is okay, but the education stands out to me."
Since living abroad in both Germany and France for a period with his German mother, St. Brown says school location will play no factor in his final decision.
"I lived in France and Germany for a little bit, so I speak French and German so I lived abroad many times," he said. "My mom is German and I went to French school so I wanted to live in Paris a little bit to speak better. It makes me not get homesick, basically."
An outstanding student, St. Brown says he is thinking about majoring in finance.
He says when he makes his decision, he'll mostly factor in how the school and program can best prepare him for the day the game is over.
"There's Life after football," said St. Brown. "So me being a smart kid I have to get a good education to live life after football."