A unitary roll-form shock and drainage pad for an outdoor field installation is formed by a continuous length of shock-absorbing polymer foam sheet. The sheet has a plurality of grooves in its lower surface, the grooves extending continuously along the length of the foam sheet and being spaced apart across the width of the foam sheet, each groove having a crest defining a maximum penetration of the groove through the thickness of the foam sheet. The foam sheet further defines a plurality of rows of vertically extending holes extending from the upper surface of the sheet toward the lower surface, the holes in each row being spaced apart along the length of the foam sheet and being aligned with a respective one of the grooves such that the holes extend into the crest of the groove. A plurality of elongate through-going slots radiate out from each of at least some of the holes.