Brendan Donovan homered in a three-run third inning, Lars Nootbaar hit a solo homer in the sixth, and the St. Louis Cardinals beat the Washington Nationals 4-2 on Tuesday night in a game that started after a 2 hour, 19 minute rain delay. Steven Matz, Phil Maton and JoJo Romero each pitched a scoreless inning of relief, and Ryan Helsley pitched a scoreless ninth for his 18th save in 23 chances.