PPR flex - Kupp, Alf, or Diggs

It’s the playoffs semifinal and In a PPR flex who do you start - Cooper Kupp, Steffon Diggs, or Alfred Morris?

Leaning Kupp since he’s been the guy in LA with woods banged up but Alfred Morris is fairly safe and Diggs should have a decent matchup at home. Not sure if Rudolph will be playing as he hurt his foot Sunday. Would love your thoughts!