Saturday, 7 p.m. at Talen Energy Stadium.
Records: Whitecaps, 6-7-3, 21 points; Union, 7-4-5, 26 points.
TV: Comcast Sports Net.
Whitecaps on the road: 2-5-0.
Union at home: 6-0-2.
Goals for: Whitecaps, 24; Union, 27.
Goals against: Whitecaps, 27; Union, 22.
Last MLS game: The Whitecaps lost to visiting New England, 2-1, on Saturday. The Union defeated the visiting Chicago Fire, 4-3, on Wednesday.
Coaches: Whitecaps, Carl Robinson, 34-28-22; Union, Jim Curtin, 24-26-17.
About the Whitecaps: Vancouver lost on Tuesday to Toronto FC, 1-0, in the first leg of the Amway Canadian Championship final.