Chase was not at Wembley after McNamara granted the 27-year-old's request to return to his family.
It was a shock selection but McNamara showed during the campaign he was not afraid to make tough decisions, with
Gareth Hock leaving the squad
days before the World Cup started for disciplinary reasons while fellow forward James Graham was left out of the team for the opening match against Australia.
"We've had some ups and downs," said the England coach. "We've dealt with things when they have come up, maybe some other teams haven't, but we have come through the other side and put in a brilliant performance today."
Miracle pass leads to Kiwi comeback
McNamara said it was time to praise the positive impact of his team's performance against the Kiwis and the wider World Cup in general.
"For our sport, this World Cup, this occasion and many others during the tournament, are doing tremendous things.
"For young kids from the grassroots who are watching, and dream that one day this could be them, I hope it inspires them.
"I hope the tournament attracts new fans and new sponsors. Our sport needs and deserves that support."
But the coach, who took charge in 2010 after previously serving as assistant, refused to be drawn on his own future.
"No, I'm not sure, it is too early," he said, when asked if he intended to carry on.
"I have been solely focused on trying to give the best preparation towards being successful. It has been a pleasure to put the programme together."
Man of the match Sam Burgess, who scored one of England's three tries, said his side did not get what they deserved from the game.
"I'm very disappointed for the team," said the South Sydney Rabbitohs forward.
"I thought our effort was there. We fought through some patches as a team and showed a lot of strength. I'm thankful for the man-of-the-match award but I'd rather have the win than this medal.
"We put a lot of hard work into this tournament and we feel we've not got what we deserved."
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