Here is the list of the top on-base percentages since the 2004 Valley League season:

1 Nick Sinay Front Royal 2014 0.534
2 Jordan Tarsovich Strasburg 2013 0.522
3 Cole Gruber Waynesboro 2014 0.518
4 Luke Greinke Winchester 2007 0.517
5 Ryan Sullivan Covington 2012 0.516
Blake Sipe Staunton 2012 0.516
7 Mike Schwartz Harrisonburg 2009 0.508
8 Mike Marcinko Waynesboro 2014 0.502
9 Tyler Townsend Winchester 2008 0.500
10 Jason Kipnis Covington 2007 0.498

This is a tough list to crack, as someone would have to get on base almost half the time to reach just the bottom of the top ten. No players from 2015 made the list, but 3 from 2014 did.

Kipnis is the only major leaguer, but Townsend, Schwartz, Greinke, Tarsovich and Sinay have all played pro ball.