One of the most star-studded relationships in sports is coming to an end. WNBA star Kelsey Plum and NFL tight end Darren Waller filed for divorce Tuesday, bringing to an end their well-publicized relationship. Plum posted a heartfelt statement on social media confirming the news. The announcement comes not long after Waller, 31, publicly questioned his own NFL future despite being under contract through 2026. He was considering whether he wanted to "invest" his mind and body into the game anymore, he told People magazine. Plum, meanwhile, is preparing for her seventh WNBA season with the Olympics in mind. The...