For a time, “The Bull”, Danny Tartabull was one of the more feared power hitters in the sport. The New York Yankees certainly thought so when they signed him from the Kansas City Royals where he was coming off his best season, but he never did duplicate that production in the Bronx (though he did get a Seinfeld episode out of it).
Mike Moustakas played the first eight and a half seasons of his career with the Kansas City Royals, where he may not have been the best player, but he was among the most popular. While it can be debated that he hasn’t had the production you would hope for in regards to a second overall pick, Moustakas (or “Moose” as he is called) has certainly had a good career and was vital to the Royals 2015 World Series Championship.