Just what is a sin-eater? A cultural anthropologist would say it is a ritual whereby a sin-eater would consume a ritual meal to absorb the sins of the deceased. Baseball old-timers had the term applied to pitchers who could absorb the sins of the pitching staff with superb performances. What today would be a stopper. An ace. An Old Hoss Radbourn.
In baseball, innings-eater is invariably applied to pitchers who take the ball with a level of consistency and give innings, but just what kind of innings? This term is usually connected with the mention of former Red Sox pitcher Rick Porcello who certainly has provided innings, but with questionable results.