SportsLine.com said it will begin using USA Networks' Electronic Commerce Solutions to run its online store. ECS will build and service the planned relaunch of the store, Shop SportsLine, which is slated to launch this spring. The deal will allow SportsLine to promote its store throughout USA's Web sites, including Ticketmaster.com and Citysearch.com. SportsLine also said it acquired the domain names, trademarks and other assets of sporting goods e-tailer MVP.com.