No, you cannot select multiple runners in any leg. Here are the key points to understand:

1. One Runner Per Leg:
   • You must select exactly one horse for each leg of the Showdown.
     
     
2. Betslip Validity:
   • A Betslip is only considered valid and can only be sold if it has one selection for each leg.
     
     
3. No Partial Entries:
   • There's no option to leave any leg blank or to choose multiple horses in a single leg.
     
     
4. All Legs Required:
   • Your Betslip must have selections for all races to be complete.
     
     
5. System Enforcement:
   • The betting platform will not allow you to submit an incomplete Betslip.
   • You won't be able to purchase a Betslip until all selections are made.
     
     
6. Strategy Implication:
   • This rule ensures all players are on equal footing, each making individual selections for each leg.
   • It challenges you to make a definitive choice for each race.

Remember, while you're limited to one selection per leg, you can always change your picks up until the Showdown goes live. Make each selection count!