I'm pretty certain we will be adding a pitcher or two to the roster, but here's a look at what innings we lost, and what we might gain, assuming the impossible 100% health:
IP Pitcher ERA/WHIP in 2021
158 ERod 4.74/1.389
It is likely Sale will not be able to add 158 IP to the 43 he has in 2021, but it's not super unlikely, either. Maybe Pivetta can add to his 155 IP in 30 starts, but we are not really filling an empty slot by adding innings to Sale and Pivetta.
137 Richards 4.87/1.595 (110 as SP 5.22/1.650)
114 Perez 4.74/1.509 (100 as SP 4.77/1.520)
Here's where it gets difficult without adding another starter. We may also lose Houck's 60 IP as a SP'er. We may add 120-160 from Whitlock, if he is moved to the rotation.
Wacha might take 100-160 innings, in 2022.
Seabold and Winckowski look to be the best internal options, without moving Houck and/or Whitlock to the rotation.
62 Ottavino 4.21/1.452
37 Andriese 6.03/1.768
25 Robles 3.60/1.360
26 Richards 3.42/1.367 in relief
14 Perez 4.50/1.429 in relief
This is about 160 IP, but with others like Workman, the total is really more like 200. It's not like who we need to replace did great, but it's not always easy finding good RP'ers.
A lot depends on what we do with Houck. I'm expecting many more IP than 59 as a SP and 10 as a RP'er. It's possible we lose his 59 IP as a SP'er but add 60-120 innings to the pen.
Maybe Barnes can go from 55 to 65 (+10), Brasier from 12 to 52 (+40) and Davis from 17 to 47 (+30). That would essentially cover the lost innings, but I hope we can do better than from what we have, now.
All-in-all, let's add some pitching!!!