The first overall pick in 2001, Ilya Kovalchuk, retired from professional hockey in 2020. However, he has now returned, and he clearly hasn't lost a step!
After one of the most controversial NHL careers of all time, where he signed one of the biggest contracts in league history, then proceeded to leave for Russia three years in, Kovalchuk is back. It's unlikely he has a long career ahead of him, but as long as his passion for the game is alive he'll have no problems.