Would an Adams acquisition make any sense? Perhaps. Let's weigh the pros and cons.
PRO: The Royals do have a gaping hole to fill at DH after Kendrys Morales (52 homers, 199 RBIs the past two seasons) departed for Toronto. And O'Brien, though filled with potential, has just 74 big league plate appearances and likely isn't much more than organizational depth at present.
Adams, however, has played in parts of five Major League seasons and is coming off a 16-homer season with a respectable .780 OPS.
Adams wasn't intimidated by left-handed pitching last season (.