Not sure where you are getting Rosario with a wOBA of .450. Fan graphs has him at .407 for his time at QC and .373 for his stint at Batavia.

None the less I like Rosario’s numbers. I did some research to see where they stack up historically.

Here’s what I found.

Players that have OPS’ed greater than .900 with the Cardinal’s Midwest league affiliate in the last 12 years or at QC during this time prior to it becoming a Cardinal’s affiliate — minimum of 100 AB’s:

Quad Cities (Twins)

1999 Restovich .925 (age 20) played parts of 6 years in the majors. (OF)

2000 – none

2001 Morneau 1.017 age 20 All Star (1B)

2002 Kabul .901 age 20 (OF) 1600+ ML ab’s and still active

2003 none

2004 none

Peoria (Cardinals)

1999 none

2000 Pujols .954 age 20

2001 Duncan .915 age 20

2002 none

2003 none

2004 Barton .956 age 18

Quad Cities (Cardinals)

2005 Stavinhoha .962 (age 22)

2006 Greene .924 (age 22)

2007 Buckman .974 (age 23)

2008 Wallace .908 (age 21)

2009 Scruggs .936 (age 21)

2010 Rosario .966 (age 21)

A summary of this analysis of 18 seasons of data:

1) a total of 12 players had 100 Ab’s with an OPS of .900

2) of those 12
— 9 have played in the major leagues (7 are still active)
— 2 (Scruggs and Rosario) are still in the minors
— 1 made it only to AA but he was an not overly athletic 1B extremely old for the league.(Buckman)

Not that this is definitive by any means but it is telling.

Has Rosario just been lucky given his low LD rate (6%)? Possibly, but that would basically mean he has been the luckiest guy to pass through QC in the last 6 years.

I’m not saying Rosario is a sure thing (he is anything but). However, I think this list shows you that he is certainly showing potential that no 21 y.o. non 1B has shown in recent years. The other guys who were non 1B and older have already contributed at the ML level.

Also Makes me wonder if I should give Scruggs more credit.