Pittsburgh claimed Kolyachonok off waivers from Utah on Sunday, Elliotte Friedman of Sportsnet reports.
Kolyachonok was put on waivers by Utah on Saturday.
Kolyachonok registered two assists and two hits in Monday's 5-4 overtime loss to the Sharks.
Kolyachonok signed a two-year contract with Utah on Tuesday.
Kolyachonok was reassigned to AHL Tucson on Friday.
Kolyachonok was recalled from AHL Tucson on Wednesday.
Kolyachonok (lower body) is considered week-to-week. He was placed on injured reserve Monday, per the NHL media site.
Kolyachonok was recalled from AHL Tucson on Thursday.
Kolyachonok was dropped to AHL Tucson on Monday.
Kolyachonok was summoned from AHL Tucson on Sunday.