If he was going to do that, then he should have just bet a 2 team parlay
well I hear you, but if this has ever happened to you, and the last game is later, you can guarantee yourself some winnings doing this..
A long time ago, I had bet a 7 team nfl parlay, I chose the opposite of what I thought would happen, and when 6 out of 7 came in, before the final game started, I called in a bet for 1/2 the $700 parlay payout, just to guarantee myself $350, no matter what happened, and all on a ten dollar parlay
As it turned out, the last game didn't come in, and I lost the parlay, but I won the $350 on my last minute bet against myself.
Had I won the parlay, and the 700, I would have lost the 350 last minute bet, still netting me $350. So I won either way, just a smaller amount.