Devers was called up in July of 2017. He was one of the few Sox prospects to be "fast-tracked," since he debuted as a 20 year old. However, he was signed as an IFA in July of 2013 and began in the rookie league in July 2014, as a 17 year old. So, it still took him 4 years from signing to the bigs and 3 years from Rookie Leagues to MLB.
Bloom has been the GM for 3 years, and has been criticized for not having any prospects called up, yet, and us "not seeing the results," more quickly. On top of this, all farm systems shut down in his first year as GM.
When you factor is the 2-4 years it takes to build up a farm and the 3-6 years it takes to develop promising new farm additions, the lag time is often 5-8 years before solid and continuous results can be expected, and this usually occurs only when a constant vigilance has been directed towards building up and maintaining a strong farm system from top to bottom, with very few major prospects trades, along the way.
The farm infusions we have seen since Devers have been pretty few and far between, and if you go back 5-8 years and add all the prospect trades made 5-6 years ago, one can better understand why the pipeline has been sputtering since Devers.
Soxprospects.com lists these graduated prospects since Devers:
8/18 Brasier
8/19 Taylor
9/19 DHern
5/21 Dalbec
6/21 Whitlock (a Bloom Rule 5 addition)
9/21 Houck
7/22 Duran
8/22 Crawford
9/22 Winckowski
10/22 Bello
The following prospects may graduate in 2023:
2. Casas
4. Rafaela (late '23)
6. Mata (late '23)
8. Walter (late '23)
11. Wong
12. Murphy (late '23)
14. EValdez (late '23)
23. Seabold
24. Downs
27. German
29. Kelly
As you can see, we should start seeing more prospects called up, next year. The quality is still speculative, but the higher numbers are real and encouraging.
Bloom added some prospects via trades and Rule 5 that may jump the timeline ahead, a bit, as they were drafted several years ago and some are or were near MLB ready when acquired. Not many of those are/were our top prospects, but it should help having so many in hopes that a few contribute. So far, Whitlock has been nice, but Wink, Cordero, Seabold, Kelly, German, Downs and Wong have had mixed or poor results, so far.
Look at the list of graduating prospects from 2018-2022 (5 years!) and think about how hard it is for a GM to rebuild a team with such little farm help.