http://www.nfl.com/player/robertoaguayo/2555408/profile
FG%:.......64.3 (ranked #33 overall)
Pat%:......90.5 (ranked #30 overall)
KO avg:....63 yards (ranked #19 overall)
Ret avg:...23.5 yards (ranked #23 overall)
I am surprised that Aguayo's KO average is so low and that Barth is much higher (64.0 yards, #13 overall). What is also surprising is that Barth is slightly better with return average (23.2 yards, #21 overall). But the difference is not significant in my opinion.
What really matters are the Pats and field goals.
Good news is that Aguayo has digged himself out of a hole. Bad news is that he still has a long way to go as a field goal kicker. Aguayo is ranked #33 overall and is only better than Murray (50%). But in fairness to Patrick Murray he has only attempted two field goals and made only one. So, looking at Aguayo's neighbors at the bottom they are: #28 Will Lutz, Saints, #29 Dan Carpenter, Bills, #29 Cody Parker, Browns, #31 Sebastian Janowkoski, Raiders, #32 Chris Boswell, Steelers.
What this shows is a bunch of undrafted players can yield similar results with kickers that were drafted high. It also shows that kickers with enough experience undrafted or not can improve. But it is clear that drafting a kicker is not a good opportunity cost.
Moving forward, Aguyao has to enter the 70% territory with FG's made and showing signs of improving. Even his neighbors at the bottom are there or close enough (Boswell 69%). In other words, Aguayo needs to make three straight field goals without missing to enter the 70% club. That is still way below average though.
Why?
NFL mean average (removing outliers): 78.2%
Aguayo need to first improve to 70%, then 75%, and then hopefully above 75% to be seen as having a good future moving forward IMVHO. I do not expect Aguayo to be 80%, 85%, or 95% kicker as a rookie. But at least NFL average or close to it as possible.