The Rendon and Musgrove Captains only boost April Topps Now Cards, which is a category Carpenter and Manea do not qualify, given that they're unavailable in the April Topps Now Program. I suspect they'll either be boosted by a May Topps Now Captain when that program starts, given they were released in May, and/or they'll be another captain down the line that boosts all Topps Now cards, to cover things like BR cards, Event Rewards, Flashbacks like the Hader Diamond Duos card
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