David Diehl, the former longtime Giants offensive lineman, certainly wants the best for defensive end Jason Pierre-Paul, as he recovers from injuries sustained in a July 4 fireworks accident.

But Diehl also questioned Pierre-Paul's maturity during a recent appearance on SiriusXM NFL Radio. Diehl, who retired after the 2013 season, spent four seasons as Pierre-Paul's teammate with the Giants.

(Diehl made these radio comments before news of Pierre-Paul's right index finger amputation emerged, as Fox Sports' Mike Garafolo, a Star-Ledger alumnus, pointed out.)

One of Diehl's most candid remarks pertained to Pierre-Paul refusing to let Giants officials visit him in the hospital.

"Denying the New York Giants access because technically you're not under contract," Diehl said, "it's almost a slap in the face to the New York Giants, because of everything they've done for you up until this point."

Diehl also mentioned the conditioning test that NFL teams give players when they return from summer break and report for training camp.