There was a time when just a few types of bets could be included, but sportsbooks are now making same-game parlays as well as team and player prop bets available as part of parlays. Sportsbooks continue to expand the types of bets that can be put into parlays. Even if the Bears lost, a bettor could still win the Ravens-Packers part of the round robin. A round robin would break up that parlay into three two-team parlays (Ravens-Packers Bears-Packers Ravens-Bears). For example, an NFL bet on the Ravens, Packers, and Bears all to win as -200 favorites, all three teams would need to win for the parlay to be successful.
A round robin differs from a parlay in that all legs of the parlay do not need to be successful for a bettor to win. A round robin bet is a set of events that are split up into mini-parlays that offer multiple chances to win.