On 7/25/06 I received a message from John Plischke III of the Western Pennsylvania Mushroom Club.

"Vlad your Aborted
Entoloma? picture is actually 2 different mushrooms in one. The fungi
underneath is Tylopilus rubrobrunneus and the thing attacking it is a
Hypomyces."

With the magic of e-mail I sent John's message to Manfred and also received a reply on 7/25/06:
Hi Vlad,
I cannot see the picture that John was referring to. The sample that I looked at has no boletoid component. The hosts brown spores with prominent germ pore place it in Strophariaceae. We cannot narrow it down more as all tissues are strongly infected. Even the structure of the epicutis is gone. The parasite is a Hypomyces but an anamorph. We will keep the sample for a while to see if a teleomorph forms. We decided not to sequence, since nobody in the lab works with either group.
Cheers,
Manfred Binder
Since Manfred has the actual mushroom while John used only the pictures, below, to come to his conclusion, I think Manfred's ID is more likely the right one.

This mushroom clump was growing on a trail.  On first impression, it looked like a giant Aborted Entoloma.

It measured 6" in the longest dimension.  It weighed 11 oz.

This picture shows more detail.

As you see, there are 3 mushrooms.  They look like they were attacked by another fungus. 

Here is a sectional view of a small one that was growing separately.