Happ is not only a LH pitcher but he is a lefty with a suspect FB. He cannot throw it inside to RH hitters without getting it crushed.
His "fooled you" set up to RH hitters is something we saw from JJ last night on occasion. Happ will set you up with the curve inside and down, trying to get you to chase it into the dirt. Then he will come back and freeze you with what you think is the curve headed for the dirt again. Only this time it is the slider that stays up off the ground and gets him the called strike with the hitter unable to pull the trigger. So Happ must stay off the inner half with his FB and must get his breaking/offspeed stuff to work for him to succeed. If he can't do that the bases should look like a pinball machine in the Sox half.
He is one of these guys that if on would have made last years impatient Sox look ridiculous quite unexpectedly like Jurrjens did. However if this edition of the Sox remains patient at the plate, they could have some fun.