ON DECK: Tory Burch is developing a sport line with the goal of introducing it in 2015. Gigi Mortimer has joined the Burch team to help develop the collection, which sources said could have a retail component. Mortimer’s background includes such positions as design director of accessories at Vera Wang, and design director of women’s accessories at Ralph Lauren. Burch, who grew up playing sports and is an avid tennis player, has been hinting about launching a sport line for several years. The company was mum about details.