He's not even the best Dodger pitcher of all time.
I think you can argue that he is pretty easily.
Through age 28 season:
http://www.fangraphs.com/leaders.as...=0&team=22&rost=0&age=14,28&filter=&players=0
1. Kershaw: 1,757.0 IP, 53.4 fWAR, 2.37 ERA, 2.55 FIP
2. Drysdale: 2,574.2 IP, 48.1 fWAR, 2.96 ERA, 3.07 FIP
3. Sutton: 2,014.0 IP, 37.2 fWAR, 3.02 ERA, 2.72 FIP
4. Valenzuela: 2,123.0 IP, 35.7 fWAR, 3.22 ERA, 3.22 FIP
5. Koufax: 1,665.2 IP, 35.5 fWAR, 3.11 ERA, 2.96 FIP
Entire career:
http://www.fangraphs.com/leaders.as...=0&team=22&rost=0&age=14,58&filter=&players=0
Kershaw could legitimately surpass Sutton for the lead in fWAR in two seasons, likely even before that 2nd season ends. Same amount of CYA's as Koufax, and he should win this year too but they probably won't give it to him.
In terms of rWAR his 7 year peak has already surpassed Drysdale, Sutton, Koufax, Valenzuela, and is comparable to Dazzy Vance. His JAWS is right around the back end of the HoF SPs (ahead of Koufax, Sabathia, Greinke, and Johan Santana). He's basically an HoFer at the age of 28.