A makeup date was not immediately scheduled, partly because the Giants aren't scheduled to return to Pittsburgh again this season.
The teams planned to play two games because Saturday night game's also was washed out -- the first time since PNC Park opened in 2001 that the Pirates called off consecutive home games due to weather. The Pirates begin a two-game series Monday in St. Louis.
Some Giants, including manager Bruce Bochy, were unhappy the Pirates didn't move the 7:05 p.m. EDT starting time Saturday to the afternoon because evening rain was forecast. The Saturday before, the Pirates-Reds game in Cincinnati was shifted from night to day with less than 24 hours' notice because of cold weather.
Determining a makeup date for the doubleheader might prove difficult because the Giants and Pirates share only three off days -- July 30 and Sept. 13, when the Giants are on the West Coast both times, and Aug. 13, the day after the teams finish a three-game series in San Francisco.
The teams could make up the games in San Francisco, but doing so would cost the Pirates the revenue from two home games.
Another possibility is July 12, the Thursday after the All-Star Game, but the Giants would have to fly to Pittsburgh and then return immediately to the West Coast afterward.
The rainout meant the Pirates could not wear Jackie Robinson's No. 42 in honor of the 60th anniversary of Robinson's debut in the majors. All the Pirates planned to wear the number, as did Barry Bonds and other Giants.
The rainouts allowed Pirates manager Jim Tracy to alter his rotation. Ian Snell, who was to have started the first game of the doubleheader, will start Monday at St. Louis and left-hander Tom Gorzelanny will pitch Tuesday. Tony Armas, who was to have started Saturday, apparently will miss a turn.
The Giants will stay on schedule, which means left-hander Barry Zito will pitch Monday at Colorado, followed by Matt Cain. Zito originally was scheduled to start Saturday.