Greenmonsters
Wannabe Duck Boat Owner
Assuming that no play was made on the runner, no, they can't. You can stop once.
We'll see if the blue crew checks in with the final word, but if I recall correctly, they opinioned that the runner can stop after EACH base before committing or retreating so yes, a runner could conceivably round 1st, stop, proceed, round 2nd, stop, proceed, round 3rd, stop, proceed to home.