Los Angeles will need Kershaw and right - hander Zack Greinke to be at their best in Games 1 and 2 .
Lefty Hyun - Jin Ryu has been dealing with shoulder soreness .
Los Angeles will need Kershaw and right - hander Zack Greinke to be at their best in Games 1 and 2 , because lefty Hyun - Jin Ryu has been dealing with shoulder soreness .