Pre-1950 was "hundreds of years ago"? 
Dave Hansen is on your list because he leads the franchise in pinch hits? Hansen played 15 seasons in total, eleven with the Dodgers. In those eleven seasons, he was worth 3.6 wins to the team. He was worth less than one-third of a win annually to the franchise.
Yet you exclude Carl Erskine, who in 1953 had a WAR of 4.2 as he won 20 games for the Dodgers. Erskine, in one season, made more of a contribution than Hansen did in over a decade with the Dodgers.
I don't know if I would include Carl Erskine on the Dodgers all-time roster. But he sure as heck would make it long before Dave Hansen.
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