De Leo signed a one-year contract with Barys Astana of the KHL on Monday, Patrick Williams of TheAHL.com reports.
De Leo, who was on the non-roster injured reserve list with a knee issue, was put on waivers by Anaheim on Wednesday, per Elliotte Friedman of Sportsnet.
De Leo (knee) was placed on season-opening injured reserve Friday, per CapFriendly.
De Leo is expected to miss about eight weeks after suffering an MCL sprain during Tuesday's preseason game against LA.
De Leo was placed on waivers Monday in order to move him down to AHL San Diego, Renaud Lavoie of TVA Sports reports.
De Leo agreed to terms on a two-year, two-way contract with Anaheim on Thursday.
De Leo was recalled from AHL Utica ahead of Sunday's game against Pittsburgh.
De Leo was reassigned to AHL Utica on Tuesday.
De Leo was called up from AHL Utica on Tuesday.
De Leo was waived by the Devils on Friday, Sportsnet's Chris Johnston reports.