1
When "mean" makes no sense in a volatile data set.
If Dave Fleming posted a 4.36 ERA in year 1, and then a 6.46 ERA in year 2, I don't suppose you'd split the difference for his year 3 projection. (He then went 5.96 and 7.50 in years 3 and 4.)
................
Am not saying that 210/250/300 is Guti's new level, but not sure I'd go with averaging here :- )