The Miami Marlins might be able to solve a lot of their rotation problems in house. Dan Straily and Jose Urena have locked up spots in the 2017 rotation. Adam Conley has been impressive in his return to the rotation. Dillon Peters and Chris O’Grady could compete for spot in 2018.
I’ve intentionally excluded Justin Nicolino from the above.
Even if they are able to fill most of their rotation woes outside of free agency, they won’t be able to address them all.