DataBall

It's been awhile for me (5 years) - but have you looked at SportsML? http://www.sportsstandards.org/ss

Feeds are expensive if you want realtime, but if you are happy with daily stats then you can easily scrape every 6 or so hours from each site you need, and fall under the scraping radar.

I've been looking around for the same. The problem seems to be that there are only a few big outlets (some with exclusive contracts) doing the stats for the big sports. It seems possible to scrape a lot of what you need though, unless you need up to date data daily (which could still be scraped but it would be a much larger undertaking).

My question is, how do you plan on getting data from the daily fantasy sites (e.g. salary caps and salaries of players)? I don't think FanDuel (or any of the other sites) has a public api for anything other than seeing user rankings.

Check with the founders at NumberFire.com

Not sure about NBA or NHL, but for NFL I'd refer you to these tools: https://news.ycombinator.com/item?id=7159731 (I was the OP of that thread, but I'm not associated with the tools' creator)

Not sure how quickly it updates, but have you seen: http://www.opensourcesports.com/

I'm not super familiar with daily fantasy (variance is obviously going to be huge) - but for NHL data check out extraskater.com - think he uses nhl event feeds. Features have been rolling out this year and it's easy to see tons of team strategy and playing time matchup data from all the situational datasets available - not updated exactly in real time but certain pieces of the site are I think.

I've been looking for similar data. What I really could use is some way to export Yahoo stats (including positions). Bonus points if I can get historical projections out of Yahoo (I'm trying a method of projecting fantasy stats that I want to compare with Yahoo's over the course of a few years. If I am right, my projections should be more accurate than Yahoo's, and if I am wrong, I have some ideas on how to adjust it).