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.
Charlie Raffa won 15-of-18 faceoffs with 11 groundballs, a goal and an assist to lead No. 1 Maryland.
Niko Amato makes 13 saves in the win, while Jesse Bernhardt lead the defense with 10 groundballs.
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.
Before Maryland: Ranked the No. 8 freshman goalie in the nation according to Inside Lacrosse ... ranked the 67th overall recruit by Inside Lacrosse ... four-year letterwinner for Coach Mat Wilson ... helped the Pioneers to a MSCLA title as a sophomore, earning Tournament Defensive MVP honors ... three time first team all-league ... also played offense in man-up situations and had eight goals and five assists ... a Warrior 40 invitee ... set the Western Reserve single-game saves record with 27 vs. Landon in 2010 ... selected to the 2009 Under Armour Underclassmen Midwest team ... also a four-year letterwinner in soccer ... team captain and MVP as a senior ... first team all-district and all-league.
Personal: Son of Mark and Kim Bernlohr ... father, Mark, played baseball at Penn State ... younger brother of Blake, who plays soccer at Roanoke College ... majoring in government and politics.