TNN had a self-operating and self-promoting sub-division called TNN Motor Sports, and aired races produced by that division from 1991 to 2000. Under the TNN Motor Sports umbrella, NASCAR series races (including those of the then-Winston Cup Series and Busch Grand National Series, as well as the Craftsman Truck Series) were the most prominently featured, but races of smaller circuits such as the International Motor Sports Association IMSA Sports Car Series, ASA, USAC, the NHRA, and ARCA were also showcased, as was motorcycle and speedboat racing.
In 1995, the motorsports operations were moved into the industrial park located at Charlotte Motor Speedway in Concord, North Carolina, where TNN had purchased controlling interest in World Sports Enterprises, a motorsports production company.
Also by 1995, Westinghouse Electric Corporation, who at the time owned the CBS networks and had an existing relationship with TNN through its Group W division, purchased TNN and its sister network CMT outright to form CBS Cable, along with a short-lived startup network entitled Eye On People (now Investigation Discovery). TNN's ties to CBS allowed it to carry CBS Sports' run overs, which happened during a NASCAR Busch Series race at Texas Motor Speedway in 1999.
TNN picked up several of the "second tier" Winston Cup races of the time, whose rights packages were allowed to expire by ESPN. Races at tracks such as Rockingham, Dover, Pocono, Loudon, and Phoenix, were among the events signed. In general, ESPN abandoned slower, longer, races which used large broadcast windows. 500-mile races at Rockingham, Dover and Pocono were known to last upwards of five hours, requiring a broadcast window as long as six hours (to include pre-race and post-race coverage). The races at Rockingham and Dover were shortened to 400 miles in 1995 and 1997, respectively, but remained part of the TNN lineup. TNN's relatively open schedule for Sunday afternoons allowed large NASCAR broadcast windows.
TNN also picked up rights to The Winston when it was moved to prime time.
In 1998, TNN acquired the one-time rights (from CBS) of the Pepsi 400. Due to wildfires, the race was postponed from July 4 to October.
The Winter Heat Series meanwhile, aired during the winter months between November and January (during NASCAR's offseason). The program began during the 1994-1995 winter and ran through the 1998-1999 winter. The races were held at the 3/8 mile Tucson Raceway Park in Tucson, Arizona. TNN originally broadcast the races before ESPN took over. Broadcasters for TNN were Mike Joy, Buddy Baker, Glenn Jarrett and Ralph Sheheen.
For the Busch Series race at Memphis in 2001, there was a mini-TNN reunion as Gold and Jarrett called the race for NBC, with Sheheen in the pits. The race had been postponed a day by rain and thus the normal NBC broadcast team of Allen Bestwick, Benny Parsons, and Wally Dallenbach was unavailable to call the event; they were in Martinsville to call the Old Dominion 500 which was also affected by the rain and postponed.
NASCAR wanted to capitalize on its increased popularity even more, so the organization decided that future deals would be centralized; that is, the networks would negotiate directly with NASCAR for a regular schedule of telecasts. That deal was struck on December 15, 1999. The old deal arrangement saw each track negotiate with the networks to broadcast their races. As a result, NASCAR had races on CBS, TNN, ESPN, ABC, NBC and TBS. However, NBC, which had just entered the sport, showed only one race in 2000. NASCAR wanted to increase the number of races by each partner, and have as many races on broadcast networks as possible, to prevent fans from missing races.
After nearly 10 years of live coverage, as well as tape delayed coverage on American Sports Cavalcade in the 1980s, TNN's partnership with NASCAR came to a close at the conclusion of the 2000 NASCAR Winston Cup Series season, with the network's final broadcast being the Checker Auto Parts/Dura Lube 500 on November 5. TNN's final NASCAR broadcast as The Nashville Network was the 2000 MBNA.com 400 on September 24. It became The National Network the next day, and on the last couple of TNN races, the new logo was in the top right corner, instead of the transparent Nashville Network logo.
Notable TNN racing personalities included Ken Squier, Mike Joy, Steve Evans, Eli Gold, Buddy Baker, Neil Bonnett, Randy Pemberton, Brock Yates, Glenn Jarrett, Mike Hogewood, Steve Byrnes, Ralph Sheheen, Dick Berggren, Larry McReynolds, Darrell Waltrip, Chad Little, Mark Allen, Mark Garrow and Rick Benjamin.