Kearney helped himself to two tries, while fellow newcomer Matt Orford delivered a hugely influential display.
Prof Jim Orford is a psychologist at the University of Birmingham who studies gambling.
New Parramatta coach Stephen Kearney previously worked with Orford during his days at Melbourne.
Prof Jim Orford of Gambling Watch UK said the organisation "fully endorses" the report's recommendations.
But McNamara's harsh words at the interval clearly had the desired effect, especially on chief playmaker Orford.
Bloor Homes is behind the scheme for the 17.5 acre site, between Manor Terrace and Orford Road.
BBC: Felixstowe south seafront housing plan from Bloor Homes
Bull's skipper Matt Orford added the first of his eight goals in a faultless display with the boot.
According to Prof Orford, problem gambling is associated with a higher suicide rate than that of the general population.
Prof Orford says that for the addict, gambling is no longer about winning.
The Bulls emerged from the break and set about seeing the game off as Orford slotted back-to-back penalty goals.
Manly forced back-to-back sets when Matt Orford's kick was fielded by Lee Smith who was dragged behind his own goalline.
After seeing Cas close to 24-12 down, Orford also dropped the killer goal just before the break which effectively closed the door.
But the Bulls hit back with a try from Brett Kearney and two from scrum-half Matt Orford, their man of the match.
Orford suffered his shoulder injury in the 19-0 defeat by Crusaders at Murrayfield in May and did not play another Super League game.
The 30-year-old had 12 months left on his contract with the Bulls but was released after they signed Australian half-back Matt Orford from Manly.
But Bradford reclaimed the lead three minutes before the break when scrum-half Matt Orford created the space to send Sykes over for another unconverted try.
The dangerous-looking Watmough extended the lead when a delightful pass by Orford created a hole in the Leeds defence and the second-rower got through to score.
Ruth Watson, former star of The Hotel Inspector on Channel 5, hit out after The Crown and Castle in Orford was given a one-out-of-five food hygiene rating.
The former Cronulla half-back is expected to link up with scrum-half Matt Orford who is yet to arrive at the Bulls following his signing from Manly Sea-Eagles.
The Bulls performed splendidly in the absence of key overseas pair Matt Orford and Brett Kearney, with Sykes and Heath L'Estrange doing well as a makeshift half-back pair.
Michael Platt damaged his heel in the warm-up and was replaced by Jason Crookes, while scrum-half Matt Orford went off with a shoulder injury early in the second half.
But, although Wigan fought back, they could not find a way through and the crucial score came instead from Orford, who wriggled free from Roberts' tackle to grab his second try.
The late virtuoso guitarist Jimi Hendrix once played in Norwich at the city's Orford Cellar during the 1960s - a venue that also saw Eric Clapton, David Bowie and Elton John perform.
And it took just three minutes for the next as Orford bulldozed his way over before converting his own score to cut the gap to eight points and bring the crowd to life.
From the resulting Manly penalty, the visitors pushed for the line and Stewart showed some quick thinking to scramble over from dummy-half and put his side ahead with Matt Orford adding the extras.
And he told Australian reporters at his first news conference in charge of the Eels that Orford is keen to return to the NRL and that there could be developments in the next few weeks.
The Rhinos made the most of their good fortune and when Kevin Sinfield's high kick got to Danny McGuire who was stopped by Orford, over the line, the ball went lose and hit Jamie Jones-Buchanan who touched down.
But Aussie scrum-half Orford was the star turn, setting up the Bulls' first two tries, with a smart reverse pass to the surging Scuton before the neat kick which veteran Steve Menzies brilliantly claimed before cleverly sending Sheriffe over.
He was unable to add the goal but, when Roberts spilled the ball, that let in Hall - and Orford kept his composure to kick his third goal and, amidst wild scenes of jubilation at Odsal, secure a breathless victory.
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