Ernie,
I'm 5'10"-250 and I throw 14lb stuff. I had a wrist injury and dropped down two years ago. I haven't noticed any loss of carry or pin action.
However, I always had a softer ballspeed than usual ( around 14-15mph) and didn't have a problem with "overthrowing" the lighter stuff.
Bones has the right idea. Don't go to 14lb until necessary, but when it is, don't be afraid of it cause with the strong cores it hits almost as hard.
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Just call me Darreyl, it's much easier to say!