By Alex Prewitt Their college careers spanned three presidential administrations. They arrived on campus before TikTok did. They are the old men of the NFL draft. By his own admission, Luc Bequette was the “butt end of all the old-guy jokes” from his teammates at California last season. Unsurprisingly the 24-year-old defensive lineman received countless new nicknames along these same punchlines too. “Some were pretty creative, like the Professor, or Ph.D.,” Bequette says. As for others? “The freshmen called me Grandpa. But I always had to remind them that if a senior is a grandpa, and a fifth-…