10. Double Base.

The Double Base is used at first base with the orange portion in foul territory and the white portion in fair territory. Referring to 4. above - a batted ball striking the white/fair portion is declared a fair ball, a batted ball striking the orange/foul portion is declared a foul ball - a batted ball striking the centre of the double base is declared a fair ball as it therefore hits a portion of the white/fair portion of the base.

The defensive player (typically the first baseman) must use only the white/fair portion of the base at all times.

The offensive player must use only the orange/foul portion of the base on his/her first attempt at first base when a play is being made on him/her. This includes when the batter-runner runs on a dropped third strike.

On a ball hit to the outfield with no play being made at first base, the offensive player may touch either portion of the base on his/her first attempt at first base.

Once an offensive player has touched the orange/foul portion of the base on his/her first attempt at first base, he/she must then use the white/fair portion of the base:

when returning to the base after overrunning first base

when taking his/her position prior to the next pitch

when tagging up on a fly ball

Points of Emphasis:

the defensive player - provided any portion of his/her foot is touching any portion of the white/fair portion of the base, he/she is considered to be in contact with the base

the offensive player - when he/she is required to use the orange/foul portion, provided any portion of his/her foot is touching any portion of the orange/foul portion of the base, he/she is considered to be in contact with the base

once the offensive player has made his/her first attempt at first base, for simplicity sake the orange/foul portion of the base no longer exists for him/her