The notable_for data is computed separately from other facts in Freebase and is not accessible from the MQL API. It is however available from the Search API, the Topic API and the RDF data dumps.
Search API:
https://www.googleapis.com/freebase/v1/search?filter=(all+type:/sports/sport)&output=(/common/topic/alias)
Topic API:
https://www.googleapis.com/freebase/v1/topic/m/071k0