KANSAS CITY, Mo. — Stuck in limbo between contending and conceding, the perennially building Kansas City Royals opted to stand pat as baseball’s non-waiver trade deadline passed Thursday.Even as several other teams in the same mix pulled off some splashy moves.The Tigers, who led the Royals by 4 1/2 games in the AL Central at the start of the day, landed arguably the biggest coup in left-hander David Price. The Mariners and Yankees, neck-and-neck with Kansas City in the wild-card hunt, also were involved in a series of trades.Meanwhile, Royals general manager Dayton Moore said “at the end of the day, there weren’t any players we could get our hands on that would be upgrades over what we have.”“We were prepared to make moves with prospects. There was nothing presented to us that made us uncomfortable,” Moore said shortly before the Royals wrapped up a series with Minnesota.