Theodore is dealing with a head injury and does not have a timeline to return, Adam Hill of the Las Vegas Review-Journal reports.
Head coach Pete DeBoer stopped short of calling Theodore's injury a concussion, but he said the defenseman hit his head hard when crashing into the boards in Tuesday's game against the Hurricanes. Without a clear timeline to return, Theodore can be considered day-to-day, though DeBoer also noted he was progressing well.