JACKSONVILLE, Fla. – The Jacksonville Jumbo Shrimp have lined up an All-Star panel for the club’s Refusing To Lose: A Discussion on Diversity in Sports luncheon presented by Sight & Sound Productions and Mugwump Productions, which runs from 11 a.m.-1 p.m. on Friday, September 18 at 121 Financial Ballpark. The panel, moderated by First Coast News sports director Chris Porter, features former Minor League Baseball player and current Charleston RiverDogs director of community outreach Chris Singleton, Jacksonville Jaguars senior vice president and chief…