Mattingly sat third baseman Luis Cruz and started Adam Kennedy because of past performances, but looked the other way when the stats showed that Juan Rivera hits Giants starter Tim Lincecum and first baseman Adrian Gonzalez does not.
"With Rivera, he'd have to play left field or first base, and for the most part the guys we brought in we're going to make it or break it with them," said Mattingly. "Adrian, Matt [Kemp], Andre [Ethier], Shane [Victorino], Hanley [Ramirez]. Those are our guys."
Kennedy earned the start at third because he is 8-for-21 (.381) against Lincecum. Cruz, coming off a .393 homestand and hitting .352 with runners in scoring position, is 0-for-2 with a strikeout against Lincecum.
Mattingly, however, couldn't find a place to start Rivera, who is 8-for-18 (.444) against Lincecum. Gonzalez has really struggled against the Giants starter, going 8-for-39 (.205) with 16 strikeouts and no extra-base hits entering Friday. Victorino was 9-for-36 (.250) with eight strikeouts.