Padres waste chances, Shields' start in defeat

San Diego Padres starting pitcher James Shields throws to the San Francisco Giants during the first inning of a baseball game Tuesday, April 26, 2016, in San Francisco. (AP Photo/Marcio Jose Sanchez)SAN FRANCISCO — The Padres gave themselves more than a chance Tuesday night. Multiple chances in four separate innings, in fact. And that was just at the plate.

On the mound, James Shields steered them into position for an upset, gritting out a performance in which he didn't top 91 mph. The right-hander yielded just one run over seven innings. San Francisco didn't record its first hit until the fifth.

When Giants shortstop Brandon Crawford began the bottom of that inning with a seeing-eye single…