From the Oilers site:
General Manager Steve Tambellini announced today the Edmonton Oilers have assigned defencemen Taylor Chorney and Alex Plante to Springfield of the American Hockey League.
Chorney was recalled to Edmonton on January 25 and appeared in eight games with no points and a -3 rating.
Plante was recalled on January 31 and played in his first National Hockey League game recording an assist with 12 minutes of ice time. He skated in four games total with one assist and a +1 rating.
That means that both Smid and Staios will play tomorrow night against Phoenix.