Banned pitch, 7 letters
Changing pitch, 8 letters
Classroom missile, 8 letters
Diamond offense, 8 letters
Illegal pitch, 8 letters
It uses liquid from a pitcher, 8 letters
It will get a pitcher ejected, 8 letters
It's hard to hit, 8 letters
Misbehaving student's missile, 8 letters
A projectile made by chewing a piece of paper and shaping it into a sphere, 8 letters
An illegal pitch in which a foreign substance (spit or Vaseline) is applied to the ball by the pitcher before he throws it, 8 letters
Classroom projectiles, perhaps, 9 letters
Hard-to-hit pitches, 9 letters
Illegal pitches, 9 letters
Wild pitches?, 9 letters