It's hard to name possible trade candidates or what it will take to get one, but that might be the best way to add an ace, this winter.
Here are some BTV values:
Assuming we don't trade Whitlock (68.0) or Mayer (55.4)...
52.4 Casas
48.4 Devers
48.2 Houck
37.7 Yorke
18.7 Verdugo
18.3 Bogey
14.8 Duran
13.0 Bello
7.7 Eovaldi, 7.6 Kike & Jordan, 7.5 Pivetta, 6.8 Downs, 6.6 Gonzalez, 5.2 Dalbec, 5.0 Lugo, 4.6 Jimenez & Winckowski, 4.4 Taylot & Walter, 4.2 Bleis, 3.8 Mata, 3.5 Groome, 3.3 Hamilton, 3.0 Binelas & McDonough
Reds:
34.5 Mahle
31.9 Greene
30.2 Castillo
Marlins
81.9 Rogers
71.6 Alcantara
65.5 Lopez
38.1 Chisholm
35.6 Luzardo
25.3 Meyer (prospect)
13.1 Sanchez
5.2 Hernandez
Guardian
79.2 Bieber
30.1 McKenzie
19.2 Civale
A's
37.8 Montas
Orioles
6.3 Means
Pirates
28.1 Bednar
21.7 Contreras
Royals
28.7 Lynch