SportsLine also entered into agreements to operate official websites for the NCAA, NFL, and PGA Tour.

The company later launched a co-branded website for CBS Sports (then owned by Viacom), CBSSportsLine[1] In August 2004, already holding a 38% stake in the company, Viacom announced that it would acquire the remainder of SportsLine in a deal valued at $46 million ($1.75 per-share) and re-align it with the CBS Sports division (owing to Viacom's ownership of CBS at the time).

[1][2] The company originally operated as a division of CBS Sports, reporting to its president Sean McManus.

In 1998, they partnered with Daedalus Worldwide Corporation, a producer of online fantasy sports products.

In August 2015, the SportsLine brand was revived for a new subscription-based site featuring statistics, sports betting and handicapping content.