On Thursday morning, Mornhinweg will wrap up his Prep career when he leads the Hawks against Malvern Prep at Plymouth Whitemarsh in the annual Thanksgiving matchup.
The shaggy-haired Mornhinweg is an elusive quarterback, as he scores with his legs as well as with his right arm. This season, he has thrown for 18 touchdowns and rushed for six.
He once compared himself to Steve Young, the quarterback his father, Marty Mornhinweg, coached for four seasons in San Francisco.
But Skyler Mornhinweg said his greatest attribute is his confidence.
"The confidence in my team and the confidence to perform," the 6-foot-3, 215-pounder said. "Every play, every down."
As a sophomore, Mornhinweg was named the starting quarterback, and as a junior, he became a team captain. He has played all four years as a defensive back.
With him under center, the Hawks have made three straight trips to the Catholic League playoffs but have failed to win a title.
They've also yet to win on Thanksgiving, losing to the Friars by one point in each of the last two seasons. Mornhinweg said Thursday's game is a shot at redemption.
"These are a bunch of great guys, and we've worked our tails off," Mornhinweg said. "It's good that we have a chance to go out with a win."
In July, the quarterback made an oral commitment to Penn State.
He had committed, as a freshman, to Stanford, but after coach Jim Harbaugh moved on to the NFL, Mornhinweg had second thoughts and backed out.
Now, after the recent sexual allegations against former Penn State defensive coordinator Jerry Sandusky and the removal of head coach Joe Paterno, might Mornhinweg be looking to make his third oral commitment?
He was noncommittal, and has yet to rescind his commitment to Penn State.
"What happens happens. You know what you're getting into and you know things change. So just deal with it and move on," Mornhinweg said.