WASHINGTON (AP) — Curt Flood’s widow has a simple explanation for why her late husband, who is revered by players for sacrificing his career to advocate for free agency, has not been enshrined in baseball’s Hall of Fame. “I think the holdup is that he got on a lot of people’s nerves,” Judy Pace Flood said. Flood has some powerful advocates on his side. Members of Congress sent a letter to the…