We have 4 legit SPs in Eovaldi (#5 ERA), Gray (#6), Perez (#23), and Heaney. Heaney is 2IP from Qualifying and would be #24. He pitches Friday, and would need to go a total of 4.0 IP.
Dunning is 6.1 IP from Qualifying and he would be #7.
So, the #5, 6, and 7 SPs based on ERA are our Top3.
Dunning is the key. I wonder if we could use an Opener and bring him in as a long-reliver/SP.
Open with Burke or Ragans (a Lefty) and let them go at least 1.0 IP and then bring in Dunning in the 2nd. Maybe even 3rd if the Opener can go 2.0 IP. Dunning comes in at the bottom of the order and you change from a Lefty to a Righty once you get back to the top. It is something Tampa does and it can be effective.
That would be more pressure on getting a LH RP, but would be much cheaper, IMO.