I admit to a virulent animus towards any Colorado Rockies starting pitcher.
No matter what the player's previous performance, I always expect the 2/3-of-an-inning-7-earned- runs appearance to be right around the corner.
(Or even worse. What Juan Cruz did to me two weeks ago - 2/3 IP 9 ER 8 runners. Yeah! HBP don't count towards WHIP!)
What would mitigate my prejudice would be the ability to move pitchers in and out of the line-up.
I still would stay away because I wouldn't want to further expose my team to risk by forgetting to make that move.
Or on a more principled basis, I don't believe timing the pitching market can be successfully done over a full season.
For proof see the aforementioned Juan Cruz's next three starts following his 2/3 debacle - 2-0 in 19 IP 2 ER 17 runners.
I had put in a waiver claim for Ken Ray the night before that three start run!