They have sucked, so far.
I'm all for giving Whitlock a slot for several more starts, and certainly over Kluber and Pivetta.
He has sucked, though, despite the small sample size.
If you go by just ERA, like many here do (not you,) Kluber has a better ERA over the last 4 weeks than Houck and Pivetta.
To me, the 5 should be...
Sale
Paxton
Bello
Whitlock
Houck