MOST TELLING MOMENT Hamler had to be helped off the field by Penn State's medical staff following his converted third down to seal the game, but no one on the Nittany Lions' sideline or in the student section let him get to the sideline before expressing their appreciation for his effort.
Michigan's leading receiver was Nico Collins, who had six catches for 89 yards.
Clifford's TD run was sandwiched between those passing strikes.
MI surrendered just seven points and 80 yards of offense in the game's final two quarters, and consistently got the ball back into the offense's hands.
Penn State jumped out to a 21-0 lead on the Wolverines in the first quarter but then went flat on offense.
Michigan State has won two straight against Penn State, both upsets in which it was a double-digit underdog. Multiple penalties, including a hold on Jonathan Sutherland, pulled the ball back to Penn State's 45-yard line, though. He finished 24-of-41 for 276 yards and rushed 12 times for 34 yards and a fourth-down QB sneak for a touchdown.
Penn State won its second game against a top 25 team in as many weeks, helping to keep the Nittany Lions in stride in the Big Ten East standings with Ohio State.
"They hit us on a long one in the first half, inside fade route, and they had a good call on there", head coach Jim Harbaugh explained.
MI coach Jim Harbaugh criticized the officiating afterward, not happy with the way his receivers were defended on the Wolverines' later possessions.
It was so loud MI called a timeout before its first snap. Patterson got the pass to his receiver in the end zone, but a dropped pass by Ronnie Bell resulted in a turnover on downs.
Penn State took over with 2:12 remaining in the game and managed to run the clock out to secure a 28-21 win over MI at home during a Beaver Stadium "white out".
BEST RUN Ricky Slade found a path wider than the Red Sea to run through on his first carry of the game late in the first quarter, and the Nittany Lion running back made the most of it, splitting linebackers Khaleke Hudson and Jordan Glasgow.
But Penn State's specialist blasted the ball almost 60 yards in the air and gunner Dan Chisena blew Donovan Peoples-Jones up for a loss at his own 10-yard-line.
Penn State visits Michigan State on Saturday. The Michigan quarterback attempted a scramble to the sidelines on the Wolverines' second play from scrimmage, but wasn't quick enough to avoid the wrath of Parsons.