D-backs GM Mike Hazen agreed he'd like to see more production at DH, but said there are other ways to use the rule that WAR can't completely quantify.
The designated hitter hasn't always lived up to its title after 2 full MLB seasons in both leagues
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Hazen said he wasn't sure why Bumgarner's steep decline couldn't be stopped.
Diamondbacks designate Madison Bumgarner for assignment
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