the Dodgers have young pitching depth.
Kershaw is 27.1 years old with a 6.0 WAR this year, and 21.4 over the last three years.
Hin Jun Ryu just turned 26 and has not played this year because of a shoulder injury, but had a 5.2 WAR over the last two years.
Alex Wood is 24.2 years old and has a 2.3 WAR in 2015, 7.3 WAR over the last three years.
Mike Bolsinger is 27 and has pitched to a 2.2 WAR this year, pretty good for limited appearances
Dodgers also have the best pitching prospect in baseball
http://m.mlb.com/prospects/2015?list=lhp
Grienke is the old man of the staff at 32