Duncan drove in a run in the first inning with a single and plated three with a line-drive single to left in the eighth.
Christian walked, stole second and scored on a throwing error by shortstop Jesus Merchan on Kevin Reese's ground ball in the decisive frame. Chris Basak drove in a run and scored once for the Yankees (47-41).
Scranton/Wilkes-Barre reliever Charlie Manning (1-1) struck out one and walked one in two scoreless frames for the win. Starter Tyler Clippard allowed four runs on eight hits while fanning three and walking two in five innings. T.J. Beam surrendered a run on a hit while striking out one in two frames in his first Triple-A game since May 3.
Lynx reliever Landon Jacobsen (1-1) gave up an unearned run while fanning three and walking two in 1 2/3 hitless innings. Starter Charles Weatherby III allowed two runs -- one earned -- on six hits and a walk over six frames.
Merchan, Jason Jaramillo and Randy Ruiz hit solo homers for Ottawa (35-52).