By Thomas Neumann The Washington outfielder is suddenly on the trade block after reportedly turning down a $440 million contract extension. View the original article to see embedded media. Juan Soto is a generational talent who’s just coming into his prime, but the star Nationals outfielder is uneasy with the uncertainty that suddenly lies ahead. In the wake of a recent report that he turned down a 15-year, $440 million contract extension from Washington, the Nationals apparently are now willing to listen to trade offers for the 23-year-old. On the eve of Soto’s second All-Star Game appearance…