Diamondbacks' Miguel Castro: Dropped from 40-man roster

Castro was designated for assignment by the Diamondbacks on Tuesday, Alex Weiner of ArizonaSports.com reports.

Castro appears to be the odd man out in the bullpen after Arizona acquired right-hander Dylan Floro from the Nationals on Tuesday. Castro will now be placed on waivers, and if he goes unclaimed, he'll either report to Triple-A Reno or elect free agency.