SEATTLE—Alvin Kamara and Jameis Winston were the happy beneficiaries of the Seattle Seahawks’ many mistakes. Then it was rookie Brian Johnson’s turn to make sure the New Orleans Saints got the win they needed to keep pace in the NFC South. “In a game like this where things are close, things get a little a little ugly towards the end, it builds confidence to be able to come into a game like this and close it out the way we did,” Saints defensive end Cameron Jordan said. Johnson kicked a 33-yard field goal with 1:56 remaining in his NFL debut, and New Orleans outlasted Seattle 13–10 on Monday night. Kamara carried the load for New Orleans and Winston made a handful of plays when needed, but the Saints (4–2) escaped Seattle thanks largely to a series of blunders by the home team, which is sorely missing injured quarterback Russell Wilson. …