We really have nothing to work with. It may take years for range factor to stabilize at the major league level. Bill James reintroduced it in 1976. He lists many problems. Among them are opportunities are not counted, outfields are sized differently, teams don’t see the same number of balls in play(due to strike outs), staffs that throw more ground balls and it doesn’t take into account the overall defensive skill of the team. Every player shares from the same pie. Team range factor is going to be about the same for every team and we know each team can’t be equally skilled defensively.