I mowed a yard today, a new client that I have done twice previously. Both previous times the yard came out fine, no problems. Today, I get done and about half the grass in the yard has not been cut, but rather 'shredded'. Instead of cutting off the tops cleanly, the tips are shredded and the yard looked like crap. I double cut it, no difference. I just put brand new blades on the mowers this morning, cut 1 lawn before this one and it came out fine. All the lawns after that came out fine as well. This one yard looks like crap and I am not sure why. The shredded grass looks like it is different than regular kbg or fescue, more stalky almost like a weed. Any thoughts, suggestions? I sharpened a new pair of blades tonight and I'm going to go recut it first thing tomorrow. I dunno if that will make a difference, the blades I had today were sharp and looked fine when I took them off.