We are a senior slow pitch league and for safety reasons we have two bags at first base. The runner is required to run to the orange bag located in foul territory. In this case I called the runner out when he ran to the white bag in fair territory. The batter hit a weak ground ball down the third base line, the fielder was unable to make a throw to first, which the runner was unaware of due to the play being behind him. The runner hit the white bag and made no attempt to advance to second base. The argument against my call was the runner should be ruled safe because no throw was made. My judgement is that runner is in no position to know if a play is imminent, and for safety reasons is required to hit the orange bag. Safety first--What say you