Although the amount of sports content on the network has gradually expanded since Fox Sports was founded in 1994 (particularly since 2013), Fox's sports schedule on weekend afternoons has remained very inconsistent to this day as the majority of its sports contracts are with professional leagues and collegiate conferences associated with more widely known sporting events, with very limited supplementary coverage of amateur, extreme or winter sports (unlike NBC or CBS) that can be aired during the daytime even when major events are not broadcast – leaving absences in daytime sports coverage on either a Saturday, a Sunday or both on certain weeks. Syndicated programming (either in the form of feature films, series or both) and/or infomercials scheduled by the network's owned-and-operated stations and affiliates, as well as occasional Fox Sports-produced specials and Fox-supplied preview specials for upcoming primetime shows fill Fox stations' weekend afternoon schedules on days with limited to no sports programming.