Williams said he had no argument with his ban after he became the first New Zealander to be sent off in a home Test during Saturday’s series-levelling, 24-21 Lions win.
Later O’Brien, who was cited for an alleged strike on Waisake Naholo, avoided punishment when the complaint was dismissed by the judicial panel.
It was a helpful turn of events for the visitors, who retain the influential O’Brien while the All Blacks will have to do without the hulking Williams in Saturday’s third Test.
“Just finished my hearing, ended up getting four weeks. Obviously really disappointed, but happy with being able to get in there and say my piece,” Williams said after nearly three hours in front of a judicial panel.
O’Brien was later cleared when the all-Australian panel said the complaint against him had been dismissed.
“Firstly, I hope Waisake is OK,” he said in a statement. “I’d like to thank the panel for carefully considering the case and I am looking forward to re-joining the whole squad to prepare for the final Test.”
Williams, the code-hopping double World Cup-winner, was red-carded 25 minutes into the Test after a shoulder charge to the head of Lions wing Anthony Watson.
He did not contest the charge when he appeared before the judicial panel at the New Zealand Rugby offices on Sunday.
‘I let my brothers down’
“They’ve come to the conclusion that it was reckless, that it wasn’t intentional,” Williams said.
“I’ve got in contact with Anthony and I’ve apologised to him but I’m very disappointed that I was sent from the field last night and that I let my brothers down.”
All Blacks coach Steve Hansen confirmed before the hearing that Williams would plead guilty. “There’s a (judicial) process, we trust the process. Sonny’s paid a big price. The team’s paid a big price for him making a mistake,” Hansen said.
“He’s disappointed. Not for himself, he accepts he’s made a mistake, but he’s disappointed because he’s let the team down.”
The All Blacks have already called Otago Highlanders centre Malakai Fekitoa into the squad as Williams’ replacement with senior midfielder Ryan Crotty already sidelined by a hamstring injury sustained in the first Test.
O’Brien has been a standout performer for the Lions in the first two Tests and is seen as a key member of their forward pack. “He’s the barometer of our energy and aggression in the game,” Lions assistant coach Graham Rowntree said.
“His ball-pressure, his tackling, his carrying — he’s been outstanding.”
Although the All Blacks were forced to play with 14 men for 55 minutes after Williams was sent off, the Lions did not hit the lead until three minutes from time when Owen Farrell landed the match-winning penalty.
Williams is only the third All Black ever to be sent off, following Cyril Brownlie in 1925 and Colin Meads in 1967.
The Lions will seek their first series win in New Zealand since 1971 next week at Eden Park, where the All Blacks are unbeaten in 24 years.
Hansen sees series decider as great for world rugby
The second test loss to the British and Irish Lions has ratcheted up the pressure on the All Blacks ahead of what promises to be a historical series decider, New Zealand coach Steve Hansen has said.
The Lions took full advantage of a man advantage for 55 minutes after Sonny Bill Williams was dismissed for a dangerous shoulder charge on winger Anthony Watson to keep the series alive with a 24-21 win, setting up a decider at Eden Park.
The All Blacks won the first game 30-15 and British media had reported that northern hemisphere club administrators were raising doubts over future Lions tours and a series loss before the third test would have intensified their opposition further. The world champions have also been riding an unprecedented wave of success in the past five years, with the loss at Wellington Regional Stadium just their fifth in 71 tests since Hansen took over in 2012.
“Everyone will be excited next week, it’ll be great,” Hansen told reporters yesteday. “Rugby’s been needing something like this for a while. “It’s now got it, so everyone will be a bit nervy about that, because it could go either way. It’s moments like these that go down in history which excite young people to say ‘I want to be part of this, not only as a player but also as a fan’.