Yes, the event pages now require a Referer header that contains the string "usfirst.org", otherwise they show up blank.
FRCLinks gets around this by adding an intermediate redirect to another frclinks.com URL that happens to contain "usfirst.org".
If you're getting data programmatically instead of in the browser, it's pretty easy to get around this. E.g:
Code:
curl -H "Referer: usfirst.org" "https://my.usfirst.org/myarea/index.lasso?page=teamlist&event_type=FRC&sort_teams=number&year=2015&event=casj"