It's very rare that Teams go Undefeated in All Sports Series and since you can't win the Championship before August, better to be done with it now. (allsportsseries.com)
Off topic: congratulations to Kolo Toure for going undefeated for a second time. (justarsenal.com)
If you've already set point spreads for each match - up, it's easy to adapt this to price the odds on either team going undefeated by simply multiplying the percentages for each team winning their remaining games. (sportsinsights.com)