Greenough was pipped for a medal in a sprint finish of the final in Oklahoma today after placing second in qualifying, in the eighth round, quarterfinal and semifinal.
He was pushed back to third at the first turn in the final but was edged on the line for the podium.
His younger brother Jack finished eighth in the final after another strong display after finishing second in his quarterfinal and third in the semifinal.
The 2023 under-23 world cup winner, Rico Bearman, who has moved to the elite ranks this year, impressed with heat wins in qualifying, eighth round and quarterfinal in elite racing.
He made a solid start in his semifinal but was blocked out on the second turn which cost him a top-four placing and a spot in his first elite final.
Earlier fellow elite Michael Bias made it to the quarterfinals before he was eliminated.
There was no fairytale return for Cambridge’s Tasman Wakelin after finishing on the podium on the first day.
The Australian-based rider was again outstanding in the early rounds, and made a superb snap out of the gate in his semifinal.
However his rear wheel slid out from under him, and he fell while leading, to end his competition.
Wakelin, who has been out of the sport for nearly four years, finished on the podium on the first day in his return to top level BMX racing, and has shown he will be a real factor at the world championships.
Earlier Finn Cogan (East City) made it to the quarterfinals in the men’s under-23 racing; while Te Awamutu’s Brooke Penny (under-23) and Rotorua’s Megan Williams (elite) went out in the last chance rounds.
Focus now goes on the UCI BMX Racing World Championships at Rock Hill, South Carolina in two weeks, which holds the additional status as the final qualifying event for selection to the Paris Olympic Games.
