It has been argued that verbal suppletion for participant number is conditioned by a word-external trigger: the plural argument (Bobaljik & Harley 2017; Toosarvandani 2016). However, cross-linguistically, there is overlap in the distribution of reduplication as well as suppletion in marking participant number. Following Haji-Abdolhosseini, Massam, & Oda (2002), I argue that if both reduplication and suppletion mark participant number, then plural arguments and events must be specified at a verb-internal node. This #-head allows exploration of the idea that apparent instances of word-external triggers are actually instances of an agree relationship between the argument and the #-head. I provide cross-linguistic evidence from languages with reduplication and suppletion for participant number to support my analysis for a verb-internal number node. This analysis bears on a broader argument regarding the locality of the suppletive trigger, which I argue, is always internal to the morphological word.