"I am transferring to St. Andrews and Ty Detmer is going to be the coach," said Dewey. "The coaches at Westlake want to keep it on the ground, so I was looking for a better fit for me."
Preston will be leaving one of Texas' best programs for a team that went winless last year. While he is eager to learn more from his new head coach, he admits it will be tough leaving his friends and teammates.
"I have grown up at Westlake and it's going to be tough to see those guys play every Friday night," said Dewey. "It is going to be tough not to be a part of all of that.
"St. Andrews is going to be a lot better team this year. They went 0-10 last year, but that was before Coach Detmer. We have some other guys coming in this fall that are going to help out too."
Breaking in with a new program is difficult especially for a senior who has not had the chance to develop chemistry or rhythm with his wide outs.
Preston is trying to make up for some lost time now as he spends some time working with his team to be.
"I am on my way to throw with some of the new guys now," said Dewey. "I have met a couple of the receivers and they can play. It's not Westlake, but I have met the team and I know there are some guys who can play."
In addition to making a decision about his high school future, Preston has put in some work at some college camps in hopes of extending his playing days beyond the prep level.
"I went to SMU, (Texas) A&M and Rice," said Dewey. "I didn't get to go to as many (camps) as I wanted to. I may be going to Tulsa, but I have a lot going on with all the school stuff. I may go to some others. I will just have to see what comes up."
The coaches that have had the chance to work with the talented quarterback this summer have had some positive things to say.
"Everybody likes my accuracy and I have been working on my arm strength," said Preston. "Like everybody else I can improve my footwork, but I have pretty good footwork now."
When decision time comes, Dewey will place a lot of emphasis on academics and the value of his college degree.
"Academics are real important to me," explained Preston. "I want to be able to use football to get into a great academic school. Not many people get to go throw the ball after college, so I want to have a great college degree and education to fall back on."