RHP has come set and the runner breaks for third.  Instead of just stepping to third the pitcher does a reverse pivot stepping to second and in the same motion throws across his body to third (not stepping to third) This all happens without the pitcher stepping off the rubber.

8.05 (c) "The pitcher while touching the plate, fails to step directly toward a base BEFORE throwing to THAT base".

Step towards 2nd and throw to 3rd while engaging the plate? Ring it up.

T__47 wrote:

 

If a RHP swings his non-pivot foot past the rubber, can he step to second but not throw, as the runner breaks for third, and then step to third?  Wouldn't this be similar to the fake to third throw to first scenario?

Pitchers from the set may step towards second and not throw there.  We see that all the time in pro ball.  Almost always, the runner at second will just go back to the base.

But if the runner takes off for third, the pitcher can abort any play to second and throw to third.  But I believe the pitcher has to disengage after the step to second before he steps and throws to third.  I don't believe a pitcher is allowed to take what amounts to TWO steps from the rubber, one to second and then one to third.

Correct, once he passes the rubber, he has to pitch or go to second. From there he has to disengage before going to third.