Tkachuk exited Monday's game against the Nashville Predators after only 13:53 time-on-ice. The Senators announced on Thursday that Tkachuk underwent successful surgery on his right thumb and will be sidelined for 6-to-8 weeks, a devastating blow for the team's offense. The 26-year-old Tkachuk scored points (0G / 3A) through three games this season prior to his injury.
