Wait so you don't think Gray being pulled when he was wasn't because he just came back from two IL stints?
"It can't be both ways; our stats say they don't do well 3rd and 4th times through, but it is only because we are protecting them from injury that we limit their innings, especially when the innings just happen to coincide with where they are in the batting order. It makes your head spin."
I think it is more than both ways it is all ways. Many factors go into every decision they make, as it should be.
Stretching out from injury downtime.
3rd time through the order.
Who is coming up next?
State of the patented TD Bullpen Usage Spreadsheet®
Injury history (i.e. Archer coming off multiple injury riddled seasons) and their plan for dealing with it.
Performance in the moment.
For me this is what I like about baseball. The in-game strategy.