Rule historians... when did the orange base stop being foul ground?

[jmkupka]

Can a runner set up on the back edge of the orange bag, in order to time her release from the bag (with the release of the pitch), and thus increase her initial momentum off the leading edge of the white bag?
Same question for tagging up on a fly ball.

[RKBUmp]

It becomes one big base after the batter runner reaches.

[IRISHMAFIA]

Originally Posted by jmkupka

Can a runner set up on the back edge of the orange bag, in order to time her release from the bag (with the release of the pitch), and thus increase her initial momentum off the leading edge of the white bag?
Same question for tagging up on a fly ball.

See RKBs response