LAD: Corey Seager (5.6 bWAR)
ARI: Ketel Marte (1.1 bWAR)
Ketel Marte has done a tremendous job filling in for Chris Owings and Nick Ahmed at shortstop. He can make any play in the field and is an on base machine with speed at the top or bottom of the lineup. At the bottom, he can turn the batting order over.
Corey Seager is just that much better. The 23-year-old hit .295 with 22 home runs and 77 RBI in 145 games. But, he only hit .179. Keep in mind, he did hit .300 during the regular season against the Diamondbacks and can make any play at short.