Quarterbacks drafted in the top 10, such as Andrew Luck and Robert Griffin III this past spring, are expected to turn into stars, but many have not. So how confident can Redskins fans be that Griffin will fulfill expectations? In evaluating quarterbacks’ professional prospects, many NFL analysts place significant emphasis on games started and completion percentage in college. By those criteria, Griffin’s chances appear very good. A look at the games started and completion percentages for all quarterbacks taken in the top 10 of the past 30 drafts reveals several things, including: It bodes particularly well for signal callers who made at least 33 starts and completed at least 58 percent of their passes. Both Griffin and Luck easily exceeded those thresholds. The chart below shows that only the top-right quadrant, where Griffin and Luck comfortably reside, contains a majority of quarterbacks who can be deemed worthy of their lofty draft positions.