One thing that I think is big is the meaningful of innings pitched. You can argue that almost every time Hader steps on a mound is very important. He is put into games when his production is almost a necessity. A starter, however, pitches every five days regardless. So at face value these guys pitched the following innings: Hader: 75 Scherzer: 172 Woodruff: 121 Verlander: 223 However, if your offense is scoring 6+ runs in a game your starter is probably not very meaningful. A lot of times your ace is totally wasted, the above three starters had 10 games combined where their offense scored 10 runs. The stats will love it and their value will rise, but really a bag of balls could have been the starter that day. I am just making a rough example here, but taking away each start where the offense scored 6+ runs this is what you have (estimated at 6 innings for each subtracted start): Hader: 70 (took away some as do believe he had some garbage time innings.) Scherzer: 106 (11 starts) Woodruff: 49 (12 starts) Verlander: 157 (11 starts) Now don't nitpick the numbers to death because really I am just trying to show a starter has a lot of value that isn't all that important. I am sure some of the games I subtracted you could go back and see that the starter may have been a huge part of that high scoring win. However, when people say a starter pitched 3x more than an elite reliever it is kind of misleading. Pitching a bunch of innings in a blowout adds to the stats, but didn't actually provide much value. The only thing it would potentially help is resting the bullpen, but that is pretty hard to track. Interestingly though, it seems Hader probably was more valuable and pitched more meaningful innings than Brandon Woodruff. Woodruff had crazy run support in 2019.