[jmkupka]

R1 on 1st, takes off on contact. Liner caught by F3, R1 is obstructed by F4 while (futilely) running back to 1st.
While I don't protect her back to 1st, as she wouldn't have gotten back even without OBS, is there an obstruction mechanic used? I'm guessing no, just explain the ruling to the OC when they come out...