The deals are both one-year agreements and are pending approval from the league.
"Kyle and Rhys are two of the best players in the game and having them both back with the Stealth is a very big step for our organization heading into the coming season," Stealth general manager Doug Locker said. "In addition to what each of them brings on the floor, we are very excited to have them in leadership positions and believe it will have a very positive impact on our dressing room."
After the retirement of former team captain Jason Bloom, Sorensen was recently named team captain for the 2013 season.
Sorensen has appeared in 75 career games, including 11 playoff games all with the Stealth and has amassed 54 points (23 goals, 31 assists) and collected 390 loose balls. He was the second overall pick in the 2006 NLL entry draft.
Duch has missed just two games in his career, spent entirely with the Stealth. He has accumulated 344 points in 62 career games, including 143 goals and 201 assists. Duch was drafted by the team with the third overall pick in the 2009 entry draft and holds the league's rookie-record for points with 89.
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