On Friday Dave Cameron had an excellent piece detailing how good rest-of-season projections are at, you know, projecting what will happen in the rest of the season. In the piece, Dave cited the work of Mitchel Lichtman at length. Go read the piece and you’ll see convincing evidence that if you want to know how a player is going to perform from here on out, you should just go look at his rest-of-season projections. Throw out what the player has done so far this year. Just look at the projection.
This topic is one of the utmost importance to daily fantasy players. This research tells us that, on the aggregate, the projection systems can tell us with virtual precision what’s going to happen the rest of the way. How is that not valuable to a daily fantasy player? The problem is, of course, that little qualifier I used: on the aggregate. The projection systems can take a group of players and tell us what they’re going to do on the whole. They can’t tell us which players are going to over-perform and which are going to under-perform so that the group reaches the expected average. And they certainly can’t tell us what each player will do on each specific day along the way. But the good news is that if you trust the system throughout, you’ll receive the positive results along with the negative results to bring you to the expected result, which is what you wanted all along.
I’ve mentioned several times that I use rest-of-season projections as the basis of my DFS system. I use the knowledge I have that the projection system doesn’t from time to time, but for the most part I just go with what the numbers tell me. And the evidence tells me that’s a good idea.
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