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Boletus Reticulatus (a.k.a. Boletus Aestivalis)
Huge! Brown and smooth. Very thick. 8 in. diameter, 10 in. tall.
Under oak trees, grassy, very rainy, humid and hot weather during July in northern Indiana.
Looks like the Summer Cep (Boletus Reticulatus) and the description kind of fits and the oak trees also suggest the same. The velvety cap is also a very good sign.