As the Diamondbacks-less playoffs continue to march on, one of the few advantages left to those teams that are waiting at home is a jumpstart on evaluating their roster holes and pending free agents. For the D-Backs, there is one pending free agent that stands above any other: Christian Walker. Since arriving in the desert via a waiver claim (his third in a month) just before Opening Day 2017 and taking over the starting first baseman role two years later from Arizona legend Paul Goldschmidt, the Pennsylvania native has cemented himself as a cornerstone of this current window of contention.