By Scott WrightSTILLWATER — After taking some additional time to think about his decision, Oklahoma State safety Kolby Harvell-Peel decided he wasn’t ready to make the NFL leap just yet.Harvell-Peel announced on Twitter on Monday that has withdrawn his name from the NFL Draft and will stay at Oklahoma State for a fourth season.A three-year starter dating back to his true freshman season, Harvell-Peel had initially announced his decision to leave last week.