TE Questions Please help

So I have Gronk and Engram and I picked up Olsen off the waiver wire. My league is PPR and it’s a 2 flex spot. Would you play all three of them when Olsen gets back sense kelvin is no longer there? Or just decide on matchups.

I would try to trade one away but my trade deadline has already passed. Thanks.

Sure can play all 3! Olsen gonna b cams number 1 as always benji there or not