When evaluating a general managers tenure, the first thing you have to look at is his draft history because the draft is the team's foundation. Simply put, the more picks that are squandered, the worse things look for the general manager and the team.
Odell Beckham Jr. has been the best Giants draft pick in the last six years.
The way the Giants' draft-selection process is believed to work (this based on crumbs that Reese himself has offered in past press conferences) is that the picks are made via a consensus among the scouts, Reese, director of college scouting Marc Ross, head coach Tom Coughlin and his assistant coaches.
Reese, as the general manager, has the final say with ownership having the right to veto any pick.
The Giants work off a draft value board in which a player with the highest grade in their row system is usually the pick; if two or more players have similar grades, it becomes a matter of need, which is where the debate potentially becomes more intense.
Lets look at Reeses last six draft classes (2010-15) as they relate to the composition of the 2015 roster.