If you ask Oregon wideout Traeshon Holden, it’s not debate who the best defensive back in college football is. It’s his teammate: Ducks defensive back Jabbar Muhammad. It’s a fairly bold claim from Holden, albeit a defensible one, as he picked Muhammad from a list of seven on a Pro Football Focus post posing the question about the best defensive back. But the other six that Holden are saying his teammate exceeds is a star-studded grouping. And of the six listed below, plenty would pick one — or more — as better than Muhammad. That’s probably why it’s a good question to start with. Georgia S Ma…