In the OFFENSE and DEFENSE decks there are ten cards which are played during the PITCHING SEQUENCE but ONLY AFTER CERTAIN PITCHES. They are - "Hit by Pitch", "Checked Swing", "Called Strike", "Foul Ball", "Foul Tip", "Wild Pitch", "Great Scoop", "Great Scoop 'n Pick-Off", "Sac Bunt", and "Sac Fly".
The "Hit by Pitch" card may be played immediately after the first pitch of the game, BUT ONLY IF THE FIRST PITCH IS A "BALL". Other cards may be used any time during the PITCH COUNT after either BALLS or STRIKES, depending on player strategy. They are played by OFFENSE to avoid strike-outs ("Foul Ball", "Checked Swing") and to advance runners ("Wild Pitch", "Sac Bunt"). The DEFENSE then may play cards to overrule them ("Foul Tip", "Called StriKe").
Please note none of the DEFENSE cards can be overruled by the "Error" card. The "Error" card is fully explained in the OFFENSE/DEFENSE rules section.
Here is a quick summery of the AUXILIARY PITCH CARDS.
"Hit by Pitch" - Played only after a "BALL" - Cannot be overruled.
"Wild Pitch" - Played only after a "BALL" Overruled by "Great Scoop" or "Great Scoop 'n Pick-Off".
"Checked Swing" - Played only after a "STRIKE" - Overruled by "Called Strike".
"Foul Ball" - Played only after THIRD "STRIKE" - Overruled by "Foul Tip".
"Sac Bunt" and "Sac Fly" - Played only after "STRIKE" but NEVER AFTER STRIKE THREE.