Adams (undisclosed) was placed on injured reserve by the Penguins on Monday, Craig Adams of the Pittsburgh Post-Gazette reports. Adams missed Saturday's contest due to the injury, and the Penguins decided to place him on injured reserve. The move was likely made to open up a roster spot with three players being sent back to Pittsburgh to get tested for the mumps. Adams will be eligible to return for the team's game Saturday against the Capitals.