Maryland seniors combined to score 14 points on "Senior Day" to power the Terps' offense.
Amato makes career-best 24 saves, while Chanenchuk finishes his hat trick with the game-winning goal.
Maryland moves to 8-1 for the first time since 2004 with the victory.
Niko Amato makes 13 saves in the win, while Jesse Bernhardt lead the defense with 10 groundballs.
Maryland tops No. 3 seed Duke, 16-10, behind four goals by senior Drew Snider.
An in-depth preview of the 2012 Maryland men's lacrosse team, featuring interviews with head coach John Tillman and team captains Jesse Bernhardt, Joe Cummings and Drew Snider.
As a freshman (2012): Made his collegiate debut in 16-11 win at Georgetown (2/24) ... had two groundballs vs. the Hoyas ... one save in final 7:13 in 17-4 win over Marist (3/10) ...
Before Maryland: A three-year letterwinner for Coach Bob Shriver at Boys' Latin ... also lettered in football.
Personal: son of TJ and Kelly Guarino ... older brother of Emma and Carson ... majoring in mechanical engineering.