How Mariota can improve his draft stock 

June, 15, 2014
Jun 15
11:02
AM ET
Oregon quarterback Marcus Mariota would have likely been a high first-round pick had he elected to put his name in the 2014 NFL draft, so it was pretty surprising when he announced that he's returning to college.

But ESPN Insider Mel Kiper Jr. writes in his early ranking of the top quarterback prospects that Mariota's decision could work out well.