MLBTR just did a similar article for BP arms as they did for SPs:
https://www.mlbtraderumors.com/2017/...ent-class.html
Here is every pitcher mentioned in those lists ranked by their xwOBA over the last 2 years:
1 Pat Neshek 0.239
2 Anthony Swarzak 0.249
3 Tommy Hunter 0.261
4 Brandon Morrow 0.261
5 Seung Hwan Oh 0.266
6 Greg Holland 0.268
7 Bryan Shaw 0.275
8 Yusmeiro Petit 0.277
9 Wade Davis 0.278
10 Addison Reed 0.28
11 Juan Nicasio 0.283
12 Fernando Rodney 0.284
13 Luke Gregerson 0.284
14 Boone Logan 0.286
15 Tony Watson 0.288
16 Peter Moylan 0.293
17 David Hernandez 0.295
18 Joaquin Benoit 0.297
19 Brandon Kintzler 0.298
20 Craig Stammen 0.3
21 Joe Smith 0.301
22 Matt Albers 0.311
23 Dustin McGowan 0.319
24 Bud Norris 0.32
25 Jake McGee 0.322
26 Dillon Gee 0.327
27 John Axford 0.329
28 Neftali Feliz 0.336
29 Jesse Chavez 0.339
30 Jeanmar Gomez 0.345
31 Tom Wilhelmsen 0.374
If the Braves want to add 1-2 BP arms, I would say anyone from Albers at #22 and up are options. With Freeman and Minter already in the fold, and Newk and Fried strong possibilities to end up in the BP, I would suggest they focus on RHers.