The trade, which also sent goaltender Michal Neuvirth to Buffalo and goaltender Jaroslav Halak and a draft pick to Washington, came one day after the Capitals had acquired Klesla from the Phoenix Coyotes. Klesla had been scheduled report to the Rochester Americans, the Sabres' American Hockey League affiliate.
"With all due respect to the Sabres organization, I decided this week not to continue playing hockey this season. It has been a tough year for injury and moving several times to new teams," the 31-year-old defenseman said in a statement reported by TSN.
"I will now take some time off and get ready to continue my career in Europe. I would like to thank my fans and all the people that have helped me. I am grateful for the career I have had in the NHL and all the people that I have met along the way who have supported me and my family."
Klesla had one goal and three assists with a minus-3 rating in 25 games with the Coyotes this season. He has 48 goals and 111 assists in 659 career games with the Coyotes and Columbus Blue Jackets, who selected him in the first round (No. 4) of the 2000 NHL Draft.