The pilot of the tailwheel equipped airplane reported that, during the three-point landing, almost immediately after touch down, the airplane veered to the left, ground looped to the left, and the right main landing gear collapsed. He added that, the airplane came to rest facing 180° opposite of the landing direction in the grass off the left side of the runway. He further reported, that when loading the airplane onto the trailer for recovery, he noticed there was a crack in the right gear leg, just above the weld to the axle. He added that 2/3 of the break showed fresh metal and the other 1/3 was rusted and corroded. The airplane sustained substantial damage to the right wing and right aileron. The automated weather observation system located at the accident airport reported that, about the time of the accident, the wind was from 230° at 9 knots, gusting to 16 knots. The pilot landed on runway 20.