Grebeshkov recored one assist and a minus-1 in four games during his most recent call-up. The Oilers have recalled defencemen Martin Marinicin and Corey Potter to replace him on the blueline.
Grebeshkov has no points and is a plus-1 while averaging 11:36 TOI in three games with the Oilers.
Grebeshkov will join team in Ottawa. He played three games during a conditioning stint, registering no points.
Grebeshkov has not participated in a game this season because of a knee injury. He returned to practice yesterday and did not suffer any setbacks. He will go to the AHL to get into game shape and then likely return to the big club.