There will be no suspense until game day.
Union coach Jim Curtin said Wednesday at his news conference that John McCarthy would start in goal Saturday in the team's Major League Soccer game against the host Chicago Fire.
Matt Jones, who just returned from a knee injury, will be the reserve.
The Union's starting goalkeeper, Andre Blake, will miss his second game of the season while he plays for Jamaica in World Cup qualifiers.
"He is a guy I trust a great deal," Curtin said of McCarthy, a product of North Catholic High and La Salle University.