Heiskanen exited Tuesday's 4-3 win over the Vegas Golden Knights in the third period with 19:50 time-on-ice after Mark Stone made contact with his knee in an awkward collision. The 25-year-old Heiskanen leads Dallas in time-on-ice (25:10) and will be sorely missed if he is out of the lineup for an extended period of time. Before his injury, Heiskanen had five points (0G / 5A) during a five-game point streak.
