It's also important to keep a team in a games for as long as 17 innings.
Also, if a game is tied when the pen takes over, there may end up being no save recorded, but a win is as good as a save in that situation. Saves and BS's do not capture those situations.
Also, if a starter lets up 7 runs in 2 innings, and the pen goes 6 innings with no ERs as the offense gives us a 1 run lead, I don't hold it against the pen, if it lets up 2 runs in the 9th for a BS and a loss. The starter went 2 IP with 7 ER and the pen went 7 IP with 2 ER, but all we hear about is how the pen sucks because of their BS amount.
Our pen has serious issues. I am not in denial, but they have done an excellent job way more than they have done poorly.
We have 8 losses due to blown saves, but we have over 20 wins due to good to excellent pen work.
Saves vs BS misses a lot.