What do you call a pitch that looks like a fastball out of hand, mimics a slider and is actually neither? Diabolical. Meet ...

Then Falter took turns using his breaking pitches, throwing a curveball to set up his sinker to get Gary Sanchez to fly out to center and a first-pitch slider before striking out Colton Cowser.

With Brash ahead in the count at 1-2, the Mariners pitcher unleashed that knuckle curveball after three straight fastballs. Castro wasn't ready at all for that kind of movement.