Fuse Science, which recently signed Tiger Woods to its roster of sports endorsers, has added a big hitter to its line-up: David “Big Papi” Ortiz. Ortiz, who had been with the Boston Red Sox since 2003 but is now a free agent, will appear in marketing and other activation for the brand, which will show that he is “Powered by Fuse” and its line of energy drinks and “replenishment” products.