Earlier this week, UCLA junior Myles Jack said he'll enter the NFL draft process. While his head coach expressed some concerns, I think Jack isn't just a good prospect, but has played plenty of football to help build his case. So many top freshmen now come in and start right away, so by the end of their sophomore seasons you're seeing guys with close to 30 games under their belts. That's a lot of football. I have Jack moving up the Big Board now that I know he's a lock for the draft. But he's just one of a number of changes since the last Big Board two weeks ago.

A reminder: General scouting reports on these players won't change much week to week, unless my overall evaluation changes. I'll simply be updating performance notes and providing updates on key matchups to come.

An asterisk denotes a junior for the 2015 season.

1. *Robert Nkemdiche, DT, Ole Miss Rebels

Great size, great burst, great versatility, and great at disrupting. He explodes off the snap like a guy 40-50 pounds lighter. And Nkemdiche isn't just quick; he also has strength at the point and doesn't get eaten up by double-teams. If he stays healthy he'll end up in the top five.

2. *Joey Bosa, DE, Ohio State Buckeyes

A complete defensive end, he disrupts but is awesome against the run. Lining up all over, he's going to be used in multiple ways by the Buckeyes staff this year, and while maybe the numbers will be down a little, I don't expect the stock to fall based on what I see. Bosa has size -- he's 6-6, 275 pounds, and could play bigger -- versatility that will fit any scheme and the ability to go around blockers or right through them.

3. *Jared Goff, QB, California Golden Bears

A little up and down against WSU, but you saw plenty of the good stuff. Goff is putting on a show so far this year, separating himself from critiques that say the system creates the QB at Cal. He can drill the ball down the field and into tight windows with ease, but also has a changeup and proper trajectory. He has effective movement skills and anticipation for a player with good length who seems to see the whole field. He can also move defenders with his eyes pretty well and will continue to get better.