The deal is reportedly worth $5.6 million over 2 years, or $2.8 a year.
The Capitals have long needed a gritty veteran presence in front of the net, and that's exactly what they got. And it's exactly what the Flyers lost.
Chris Pronger is now the sole previous Stanley Cup Winner on the Flyers, as well as the Flyers new oldest player.
Knuble joined the Flyers in 2005 after the lockout, scoring 114 goals for the Orange and Black over four seasons.
In the 2008-2009 season, Knuble was only one of three Flyers to play all 82 games (along with Scott Hartnell and Jeff Carter). He scored a fifth-best 27 goals and a sixth-best 47 points. He averaged 18:10 of ice time per game, and was a +5 on the year.