A lot has been said about overwatering here at OP... A good article was written by a representative from the USGA about the reasoning behind irrigating turfgrass.
Take a look: http://gsr.lib.msu.edu/article/hartwiger-ten-3-21-14.pdf 
The water going out today was a quick little three minute syringe to knock some soil amendments off the leaf blade and into the soil.
