UPDATE: Trade talks surrounding Hudson have come to a halt. Nick Piecoro of the Arizona Republic tweets a quote from D-backs GM Dave Stewart saying "the tide changed" on a deal he was closing in on. Steve Gilbert of MLB.com adds that it was the Hudson deal.
Teams potentially involved in a deal are unclear, but Bob Nightengale of USA Today reports that Arizona is drawing "heavy interest" from three teams on the 29-year-old. He adds that a deal isn't expected to get done on Thursday.
Hudson got off to a strong start this season, allowing just three earned runs between April and May, but has since been a disaster on the mound. The former starter has allowed 22 earned runs in his last 16⅓ innings, causing his ERA to jump from 1.31 at the end of May to 6.08 now.
Hudson has undergone Tommy John surgery twice, which is one of the reasons why he was converted into a reliever full-time in 2015. He's a free agent at the end of the season, so it's likely that a deal will only net the Diamondbacks a minor prospect in return.