Excavations by the BYU-New World Archaeological Foundation at the site of Tzutzuculi on the Chiapas coast of Mexico, revealed two engraved monuments flanking a central stairway of a late Middle Preclassic period pyramidal platform. This report focuses on these two monuments, discussing their context, dating, and style. The context at its most general level involves the corresponding platform complex, which in its layout has a general resemblance to the Olmec site of La Venta. As for the monuments-one a were-jaguar representation, the other a serpent-dragon figure-they too, in their style, are identified as being Olmec. Moreover, their combined imagery, possibly expressing a dualistic viewpoint, is consistent with other Olmec iconographic examples. At Tzutzuculi, however, this imagery has for the first time in Olmec form been found in direct association with platform building.