McCoy, now head coach of Graham High since '05, has seen his younger son rise to become one of the state's top passers and land a scholarship offer from the University of Texas.
Case came in and started as a freshman on a playoff team," said McCoy. "As a four year starter he has a very good understanding of the game. He's gotten stronger every year both physically and mentally. He's become a leader for us, unanimously voted captain by his teammates, and is a real student of the game."
In his final year at Graham, McCoy is on pace for his best output yet passing for 2,310 and 26 touchdowns through the first eight games.
"He's been throwing the ball at a huge rate and has been very accurate," said McCoy.
Case only has six interceptions on the year.
Having an accomplished older brother, who was the runner-up in the Heisman race of 2008, has its privileges for Case McCoy.
"He's has a pretty good mentor in Colt," said McCoy. "They talk and compare notes. If you look at senior film on Colt and look at senior film on Case, you can't tell a difference in the two except Case may be a little bigger.
"Case possesses all the intangibles you want in a quarterback. He's very elusive and has the ability to escape pressure, stay on his feet, and make a play. He's been beat up and banged up a lot this year, but he's out there competing trying to get a win for us."
The Graham Steers are 7-1 on the season with a one point loss to Brownwood on a missed extra point being the only blemish of the year thus far.
"He's a coach on the field for us," he said. "He"s good at going 2-3 deep into his reads, and if there's not a play there to be made he can make it with his feet."
The town of Tuscola only had a population of around 700, so it was big news for small towns everywhere in Texas when UT recruited Colt in '05.
"We always liked R.C. Slocum at Texas A&M," says McCoy. "But he left, and Franchione came in. We also liked Jimbo Fisher, who was then the Offensive Coordinator at LSU. But I think Colt fell in love with the mystic of Texas. He liked how Mack Brown presented a family type of atmosphere, and how he managed his teams."
That family atmosphere helped bring Case into the Longhorn circle as well.
"Well, he's been going to games there for five years now," McCoy said. "So he's comfortable there. He knows all of the coaching staff very well. With Texas, he knew what he was getting. The expectations will be high for Case to be good enough to follow what his brother did at Texas, but he doesn't see it as a bad thing. He thinks it will be helpful to him having a brother who's been there and done well to get advice from."
Case is 6-2, 180, and runs a 4.6 40.
"Case is strong-willed," says Coach McCoy. "He's very active in his church and FCA. He's humble, helpful to others. He likes having fun with his friends, but he's disciplined in his studies. His GPA is 4.15. Case is a good kid who's not out doing anything wild. He has a great set of priorities."
Case comes from an athletic family. Older brother, Chance, was an All-State wide receiver and played with Colt in high school. He currently plays at Abilene Christian, their parents' alma mater. Case's grandfather, Burl McCoy, is in the Abilene Christian Hall of Fame having coached the woman's basketball team at the University.
Case also had offers from Arizona, Auburn, Colorado State, and Texas A&M. He wears No. 4 for Graham High School.