Baseball people, especially American League GMs, are often leery of importing pitchers from the NL to the AL. There are obviously exceptions to that rule and J.A. Happ is proving to be one in the short time he has been with the Blue Jays.
"J.A. has pitched well for us, progressively in the four starts he's made. He's demonstrated consistent swing-and-miss with his fastball," Blue Jays manager John Farrell said. "The main difference (between the NL and AL) is obviously the DH, not being able to manage the bottom third of the lineup as you might in the National League.
"In either league, the question is how you navigate through the middle of the order. How does your stuff play against the middle-of-the-order bats? What we've seen so far, it's been very good."
Happ defies AL-NL theory
Toronto Sun | Aug 30