Odd play

[rharrell]

Saw this last week and all the D3K talk made me think of it.

Batter has 2 strikes, next pitch hits the ground and she checks her swing. PU calls ball.

Batter thinks its D3K and runs for 1B, catcher's throw beats her and base ump points to 1B and calls her out.

Bedlam ensues and BU offers the explanation "she's out because she ran", but never mentions an appeal on the check swing. The PU did not appeal the check swing.

Wouldn't this fall under the "not a batter runner" category where the batter was not yet qualified as a runner and could not be put out.