Out of the five Nittany Lions that attended the combine, Jaylen Reed was the only one to participate in on-field drills.
"I want to take the time to thoroughly evaluate my options and ensure that the school I choose aligns with the values my family and I hold."
Carter's agent said he still believes the former Penn State star will be the No. 1 overall pick in the NFL Draft.
The All-American tight end also received an invite to the NFL Draft Green Bay, an honor only given to a handful of first-round prospects each year.
That's the second time McGloin quit his job this week.
Connor was a two-time All-American linebacker for Penn State and the program's all-time leading tackler.