Brendan Piakura has escaped sanction for the shot that injured Luke Metcalf's knee and threw the Warriors star's season into doubt.
Piakura went on report in the second half of Brisbane's 26-12 win on Saturday for hitting Metcalf after he had passed the ball.
The 26-year-old was unable to continue and will go for scans on Monday once the team is back in Auckland.
Warriors coach Andrew Webster said medical staff could not rule out an anterior cruciate ligament tear for Metcalf, who has an extensive injury history.
Webster said Metcalf would not play the Warriors' next game on July 13 and would be joined on the sidelines by fullback Charnze Nicoll-Klokstad, who also went down with a knee issue against the Broncos.
On Sunday morning, the match review committee opted against charging Piakura altogether for the late hit.
Metcalf is in the midst of a breakout year and had been leading the Dally M Medal race when voting went behind closed doors after round 12.
Any long-term injury for the halfback would be a big blow to their hopes of a top-four finish, and would blow the Dally M race wide open.
The Warriors have lost their past two games but face only one more top-four side, Canterbury, on the run home.
Te Maire Martin appears the likeliest candidate to join Chanel Harris-Tavita in the halves to face Wests Tigers in a fortnight, but Tanah Boyd is an option for a club debut.
Elsewhere, Parramatta second-rower Kelma Tuilagi has been offered a three-game ban for a crusher tackle that enraged future Eels teammate Jack de Belin.
A fracas erupted when Tuilagi bent St George Illawarra forward de Belin awkwardly in a tackle during the Dragons' 34-20 win in Wollongong on Saturday night.
Tuilagi will miss upcoming games against Penrith, Canberra and Brisbane with an early guilty plea, in another blow to a Parramatta side already without Mitch Moses.
He risks missing a fourth game, against Melbourne, by challenging the charge.
Tuilagi is set to become the third Eels player sidelined through suspension, with hooker Ryley Smith and centre Will Penisini offered big bans after last week's win over Gold Coast.
Parramatta prop Jack Williams can accept a $1000 fine for his high shot on Dragons forward Emre Guler.
