Cain provides own backing with 3-run homer

Matt Cain belts a three-run home run to left field, his first of 2016, to extend the Giants' lead to 4-0 in the bottom of the 2nd inningSAN FRANCISCO -- In need of an offensive spark, the Giants got it from an unlikely source Tuesday night: Matt Cain.

In his first appearance at AT&T Park since June 13, Cain came to the plate in the second inning with runners on first and third and one out, and slugged a three-run homer to give the Giants a 4-0 lead vs. the Reds.

Ramiro Pena had scored Brandon Crawford one at-bat prior on an infield hit. He also moved Brandon Belt to third; Belt had reached second base a plate appearance earlier thanks to an error from Adam Duvall. Initially, Belt was ruled…