Cornerback Joey Porter Jr. is widely projected as a first-round selection in many NFL mock drafts.
After conceding seven runs in the fourth inning, the Nittany Lions couldn't make up the deficit manufactured by the Tar Heels.
Under the non-exclusive tag, other teams are able to negotiate a contract with Barkley, though the Giants can still match any offer.
Jalen Pickett earned first-team All-Big Ten honors from both the coaches and media.
The Nittany Lions dropped to No. 11 in the USCHO Poll.
After forcing a third game in the series and striking first on Sunday night, the Nittany Lions couldn't respond to three Buckeye goals.