Published by
New York Daily News
New York Daily News
DUNEDIN, Fla. — There is a whole new air of professionalism around the Blue Jays this spring, and right in the middle of it is a guy who couldn’t look more out of place in a royal blue and white Toronto uniform with the red Canadian maple leaf logo on the front than Donald Arthur Mattingly. I caught up with “Donnie Baseball” conducting infield drills on one of the back fields of the Blue Jays’ minor league complex the other day, and as I approached him, he smiled, knowing what I was going to ask him. “So what are you doing here, in the belly of the enemy?” “I’ll be honest,” Mattingly said. “Wh…