The 19-year-old winger now has seven tries in his last three appearances as Rhinos followed-up last Sunday’s fiery 38-12 success at Salford.
A capacity 4,000 crowd – the most at Headingley since last year’s coronavirus shutdown – appreciated Leeds’s free-flowing performance that brought five further tries.
“They started better, but after that we did a really good job,” said Rhinos coach Richard Agar. “What pleased me was the amount of young players coming in and doing a job.”
Leigh, under the guidance of interim boss Kurt Haggerty for a fifth time, played their part in an entertaining encounter but they folded after initial promise and have now suffered 13 straight defeats.
Depleted Leeds were still able to bring back seasoned stand-off Rob Lui for his first game of 2021 after suffering a pre-season quad muscle injury.
Scoring points has not been an issue for Centurions this season, and they brought up 200 with winger Matty Russell’s third-minute try and Ryan Brierley’s conversion.
However, neither Haggerty or predecessor John Duffy have figured out how to stop opponents scoring against Leigh.
Any optimism quickly faded with James Bell’s yellow card for tip tackling England prop Mikolaj Oledzki. When the ex-Toulouse forward returned, Leeds led 10-6 after tries from James Donaldson and Broadbent.
Leeds were now on their way to their fifth Super League win as Broadbent, Kruise Leeming and Liam Sutcliffe struck before the break. Rhyse Martin converted just two of his team’s five opening-half tries, otherwise Leeds’s win would have been further guaranteed.
However, supporters need not have worried as the Rhinos stayed on the offensive for much of the second period as well.
Mark Ioane cut the deficit with a 49th-minute reply but Leeds were back on the attack and Broadbent should have completed his treble after 52 minutes, only to drop the ball with the try-line at his mercy. He was not to be denied a career breakthrough, though, and swooped on Leigh’s vulnerable right edge after 58 minutes.
The visitors conceded further tries to two more of Leeds’s prospects, Sam Walters and Tom Holroyd, while Broadbent touched down for his fourth of the night in the closing stages.
Martin finished with six goals while Ryan Brierley notched his 199th career try for Leigh before leaving the field with an injury.
Leeds: L. Sutcliffe, L. Briscoe, Martin, T. Briscoe, Broadbent, Lui, Leeming, Oledzki, Dwyer, Holroyd, Donaldson, Gannon, Prior. Substitutes: O’Connor, Vuniyayawa, Walters, Tindall.
Leigh: Mullen, Russell, Thornley, Sa’u, Brand, Brierley, Mellor, Peteru, Hood, Thompson, Hellewell, Gee, Bell. Substitutes: Ioane, Gerrard, Wildie, Peats.
Referee: Aaron Moore (RFL).