There's an important difference between a projection and a prediction. A projection is a hypothetical interpretation of existing data without assuming any specific level of certainty. A prediction is a projection, except that a prediction seeks to produce a level of certainty that a projection does not. For instance, financial professionals can get in a lot of hot water if they say they can predict something, whereas in certain situations they won't be held liable if they use the term projection. (And in some situations, they can't even do that, they have to forecast). All of the various projection models out there - ZIPS, PECOTA, Marcel, etc., do not make a prediction of certainty at the player level. It would be virtually impossible to do that because there isn't enough data gathered within the course of a season for an individual player to make anything other than a vague guess at future outcomes. Those same models do aim for some certainty on league-wide production, and generally get that more or less right, and could probably be considered a prediction at that higher level. Team-level projections fall somewhere in between, and I guess it could be argued that seasonal win totals are predictions, though I doubt the creators of the analytics would say that. A forecast, as I usually see the term used, is using data that occurred in the past and assuming it will continue along undisturbed in the future. No hypotheticals and no interpretation like projections (and therefor predictions). Strictly speaking, a forecast would actually probably be more useful on the individual player level, i.e. Braun did this last year, so let's assume he'll do it again next year. For established players, this is going to be pretty accurate most of the time.