The most useful question is not who wins a simple contest for the word first. It is how participation became possible, how it was restricted and how later remembrance simplified that sequence. Walker played for Toledo when the club competed in the American Association in 1884. His history therefore makes racial exclusion visible as a process that was built and enforced, not a permanent condition that had always existed unchanged.
A traveler should also distinguish biography from a route. Walker’s connections cross several Ohio places and extend into Michigan. These locations do not form a compact neighborhood walk. Pick a place that fits an actual trip, then use documentary research to connect it to the wider story instead of rushing between distant sites merely to assemble a list.