That dream will become a reality, with the Foothill High quarterback making a commitment on Tuesday.
"Yesterday I called Oregon State and verbally committed," said Mannion. "I mean it's great. The Pac-10, it's one of the best conferences in the nation. And it's exciting to know that I could play in an elite league. That was really awesome."
Mannion was offered by OSU on Monday, his first offer, and then 24 hours later, called the coaches to let them know he was ready to be a Beaver.
"Coach Langsdorf offered me so he was the one who I called and committed to," said Mannion. "I spoke to coach Riley and it sounded like he was pretty happy. And I was just as happy, if not more. It was really exciting to hear them offer me and then take my commitment."
MANNION HAS ADMIRED Riley's coaching ability, and he's no stranger to good coaching, his father has been the longtime successful coach at Foothill.
"That's one of the things, I'd say that made my decision the most, just the fit," said Mannion. "Their offense seems similar to what I run in high school. Their coaching staff is just great and I just meshed with them. Coach Riley, he's a great coach, along with all the other coaches, and it's exciting to play for such a great guy and great coach."
MANNION WAS CONFIDENT a good showing at the Oregon State camp could net him an offer, but he didn't put any extra pressure on himself.
"I think coming out of the camp, I thought it went really well," said Mannion. "I tried not to expect an offer, but I thought I did well enough, that they could have. I thought I did well at the camp, but I didn't expect it to come that quickly."
Mannion said getting the decision over and done with was a big relief.
"My focus has always been on my school team at Foothill," said Mannion. "I kind of always felt if I do good in high school, the rest would take care of itself. It's relieving to know where you're going and that now you're just playing for your school."
MANNION SAID the long wait for the first offer wasn't an issue, that he was aware of the process it takes to recruit a quarterback. He's just happy to have the opportunity.
He's happy to be staying out West too.
"That is exciting, being able to come to play close to home (each year for a game in the Bay Area)," said Mannion. "My family was supportive of all the schools. Not once have they said, ‘we want you to go here'. No matter where I was going to end up going, they would have been happy with it."
And Mannion said his dad has been supportive as both a parent and as a coach.
"It's been like that my whole life, I didn't really notice a change," said Mannion. "As a coach and a parent, I think he's been really experienced and helpful and he always did see it in me."
Sean Mannion profile and video