NEWTOWN SQUARE, Pa. — A conversation with Keegan Bradley will never leave you wanting for more emotional transparency, and this is a rarity among athletes in the current generation. Bradley, speaking Monday in advance of this week’s PGA Championship at Aronimink, opened several veins — speaking about his love affair with this major championship, which changed his life, and his volatile relationship with the Ryder Cup, among other things. Bradley, as a rookie on the PGA Tour, won the 2011 PGA Championship at Atlanta Athletic Club. He also won the BMW Championship in 2018 at Aronimink, his first victory after some six years of struggling with his game. Both events had profound effects on his life.  “After the PGA in ’11, my mom and sister were there … I remember driving out of the Atlanta Athletic Club with the Wanamaker [Trophy] in my lap, holding it and we were looking at each other like, ‘This is crazy,’ ’’ Bradley recalled. “We were trying to get some beers or something and everything was closed.…