The marquee matchup of a weekend duel for first place was supposed to take place Friday before the Los Angeles Dodgers pulled a late switch and nixed a battle of aces. The Dodgers' Clayton Kershaw no longer will match up with the Arizona Diamondbacks' Zack Greinke in the second game of the four-game series at Dodger Stadium as fellow left-hander Hyun-Jin Ryu will take his place for the Dodgers Friday night. It wasn't that the Dodgers wanted to spread the pitching wealth around the series.