Abstract: An improved baffle for a pony rod arm of a two cycle reciprocating pump having a gear end containing gear oil and a fluid end channeling oilfield fluids, provides a spiral cut expanded baffle which may be expanded to be installed on a pony rod arm of the pump without requiring the disassembly of the pump to install the baffle on the rod arm, the expanded baffle compressed and attached together subsequent to installation on the rod arm, the baffle slidably engaging the rod arm to strip the rod arm of liquid residue to prevent contamination of the gear end and the gear oil by the oilfield fluids.