Duncan drives in five for Keys

FREDERICK, Md.-Jacob Duncan homered and knocked in five runs to lead Frederick over Potomac, 10-7, on Sunday at Harry Grove Stadium.

Duncan hit RBI singles in the first and fifth innings, lifted a sacrifice fly in the sixth and blasted a two-run shot in the eighth. It was his best offensive performance since he went 4-for-5 with a home run and three RBI on July 13, 2006.

Jon Tucker reached base in all five of his plate appearances, scoring four times, and Ryan Finan drove in two runs for the Keys (11-10). Catcher Justin Johnson threw out three potential basestealers.

Carlos Perez (1-0) limited the Nationals to one hit over five innings. He allowed one run, struck out three and walked five. Bob McCrory nabbed his sixth save with a scoreless ninth.

Potomac starter Craig Stammen (2-1) allowed seven runs -- four earned -- on eight hits and three walks in 4 1/3 innings. He struck out one.

Marcos Yepez and Luke Montz each homered and Ofilio Castro added two doubles and a single for the Nationals (11-10).