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Over at MC, MA put up a detailed analysis on Wedge.
Basically he tends to rely on his top relievers in very defined roles, doesn't use platoon advantage, and tends to let the bottom end of the bullpen sit on the bench.
Hargrove's weakness was burning out his starting position players and not utilizing the bench. Wedge's weakness seems to be the same with the bullpen.
Apparently, Wedge might prefer veteran players to the kids and has a similar personality type to Hargrove.