According to sources, PeteCarroll gave the team a presentation about the 50th anniversary of the 1972 Miami Dolphins and asked them why they couldn't do the same thing.
Events can't happen until a team believes that they can. During his time at USC, he coached teams that won every game for three years in a row.
Sources say that Carroll told the players that it was possible.
Seattle started their season with a victory over the Denver Broncos and former quarterback Russell Wilson on Monday Night Football.
The 49ers will be the team to beat in the second week of the season when they face the Seahawks.
The Seahawks were widely predicted to struggle this season after trading Wilson to the Broncos, but they were still able to win the Superbowl. The only Super Bowl in franchise history has been won by the Seahawks, who have made nine postseason appearances and won the only one.