Mack was considered one of the Nittany Lions' best rising prospects after his one year in Happy Valley.
The Nittany Lions are 0-2 as underdogs this season.
The Nittany Lions most recently beat the Fighting Irish 31-10 in the first full Beaver Stadium White Out.
"I'm a believer. I wasn't a believer in Penn State early on. I'm a believer right now."
Barkley and Parsons will represent the NFC in this year's Pro Bowl.
From Tom Allen's defense to Chuck Losey's mustache, our writers broke down the hottest takes from Tuesday's win.