After NBC lost its NFL rights to CBS at the end of the 1997 season, it in the process, marked the beginning of a slow decline for its sports division, culminating in the unproductive 2004–05 prime time season (despite heavy lineup promotion during the 2004 Summer Olympics), when NBC carried no major sporting championships during prime time (NBC had already lost Major League Baseball broadcasting rights in 2000 and National Basketball Association rights in 2002; the network had acquired National Hockey League rights in 2004, but that league was involved in a lockout that cancelled the season). The other major sport on NBC was the NASCAR Winston/Nextel Cup Series.