Thursday, July 17
LIFEGUARDING, East Hampton Village Main Beach tournament, 4 p.m.
BEACH VOLLEYBALL, games at Kirk Park Beach, Montauk, from 6 p.m.
Friday, July 18
COLLEGIATE BASEBALL, Southampton Breakers vs. Montauk Mustangs, Montauk School, 5 p.m.
Saturday, July 19
POLO, opening day, Two Trees Stables, Hayground Road, Bridgehampton, 4 p.m.
Sunday, July 20
TRIATHLON, Montauk Sprint, one-half mile swim, 14-mile bike, and 5K trail run to the lighthouse, Gin Beach, 7 a.m.
COLLEGIATE BASEBALL, Montauk Mustangs vs. Sag Harbor Whalers, Mashashimuet Park, Sag Harbor, 5 p.m.
Monday, July 21
COLLEGIATE BASEBALL, North Fork Ospreys vs. Montauk Mustangs, Montauk School, 5 p.m.
Wednesday, July 23
COLLEGIATE BASEBALL, Montauk Mustangs vs. Shelter Island Bucks, Fiske Field, Shelter Island, 5 p.m.
MEN’S SOCCER, 7-on-7 league championship game, Herrick Park, East Hampton, 7 p.m.