Popular annual fund-raiser for the Ronald McDonald House Charities of Memphis, with 30 wiffleball teams competing. Beyond wiffleball, there will be a silent auction, a hot-dog eating contest, a dunk tank, a home-run derby, a poker tournament, a hula-hoop marathon, and live music from Brian Sharpe, Clanky’s Nub, and others. Food will be provided by Alex’s Tavern. Continues Sunday from noon to 10 p.m.