Allister Coetzee says both players are long-time and key members of the playing squad.
The Stormers take on the Lions at Newlands on Saturday.
The Cape-based side are set to welcome back several key players from injury.
The utility back is set to make a return from injury during the clash against the Hurricanes.
The Stormers hope to bounce back from their first-round defeat when they take on the Hurricanes on Friday.
Fullback Jaco Taute is likely to be named to face the Hurricanes following months on the sideline.