A year ago, Wade Miley’s spring-training mornings were spent struggling to spell difficult words in the Diamondbacks clubhouse, much to the amusement of his teammates. His aura came to be known as “Wade’s World,” a sort of nod to the fact that Miley sees things just a little differently than everyone else.

But while that might make him seem a little, shall we say, lacking, the truth about the Diamondbacks left-hander is this: Wade Miley is not a dummy. He just acts like one in the Diamondbacks clubhouse.

“I think he plays the dumb card a lot,” reliever David Hernandez said. “But he’s smart.”

He’s at least smart enough to know when to stay out of his own way.

He did that last season en route to turning into one of the better surprise stories in baseball.

Expected to report to Triple-A Reno, Miley surprisingly made the Diamondbacks’ Opening Day roster, went on to pitch 194 2/3 innings with a 3.33 ERA and was named to the National League All-Star team.

He finished second in the NL Rookie of the Year balloting behind Nationals outfielder Bryce Harper.

Now, entering his second full big-league season, the question for Miley, 26, is if he can do it again.