Who to start? (1 Viewer)

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I have 2 flex spots to fill. Which 2 do I start? Leonard fournette (vs NO), Zach moss (vs. MIA), Elijah Mitchell (vs CHI), DJ Moore (vs ATL). I also have Stefon Diggs (vs. MIA) James Robinson (vs. SEA), and Calvin Ridley (vs. CAR) starting who I consider locks to keep in according to their matchups. Who do I start? Standard PPR league. Thanks in advance