Just one goal in his opening ten top-flight appearances this season had numerous wondering whether Dominic Calvert-Lewin's peak were in the past.
However, a just four weeks afterwards, he is the most talked-about attacker in England following bagging seven goals in 6 back-to-back games.
His newest goal, in a tie against Sunderland, took his season's haul to eight, seeing him become the highest English scorer in the Premier League this term.
The 28-year-old joined Leeds United on a Bosman move in the summer, following a nine-year spell with Everton that was marred by injuries in its final stages.
Yet, the numbers behind his revival in Daniel Farke's new counter-attacking 3-5-2 system are truly impressive.
His six-match scoring sequence places him in prestigious company as just the 11th English player to score in six or more straight Premier League matches.
To frame that statistic, even England captain Harry Kane never managed a run this long - his longest stands at two distinct five-match streaks.
And the sole English striker to surpass Calvert-Lewin in the modern era is Jamie Vardy, who embarked on an eight-game scoring run for Leicester City in 2019.
Why has Calvert-Lewin so hard to stop in the past month? A latest opponent's manager explained it aptly.
"He has the ideal timing," the manager said. "He's intelligent and a excellent striker and he found the timing to arrive at the perfect moment."
That natural ability and timing inside the box was what turned him into a beloved player at his former team.
Pundits point to the system adjustment to a 3-5-2 as a key factor, helping a greater number of players to occupy the box and occupy defenders, thereby given the striker a little more space.
"He is a archetypal centre-forward," observed a former professional. "For the goal... it was a lovely little finish beyond the keeper, a classic centre-forward's goal."
"I've been through a lot since then. Lots of ups and lots of downs. A challenge of resolve and I've hung in there and kept going... I've backed myself and this is the result."
His manager has voiced complete confidence at this rich vein of form, reiterating that the player is "one of the best strikers" in the league.
Calvert-Lewin's resurgence has inevitably fueled discussions of an England return.
The ex- Sheffield United player has eleven England caps, scoring four goals, but has not played for the national team since the previous European Championship.
Pundits believe the striker will be in consideration for the World Cup squad if he can keep up this form.
"He looks as sharp as he has in a while," one said. "If he continues this level of form... then he's going to be in a conversation for a World Cup place."
But, the battle for places supporting Harry Kane is incredibly tough.
Ollie Watkins of Aston Villa, fresh off a decisive two goals against Chelsea, is right now seen as in front in the selection race, according to some analysis.
"If you contrast the two players, Watkins possesses the edge in terms of using his pace to stretch teams," it was said.
"He also has the advantage when it comes to making a decisive impact at a major tournament."
In the end, whether Calvert-Lewin is part of the squad might come down to how many natural strikers the national team coach decides to take.
"I think it might come down to whether the manager selects two or three centre-forwards," an analyst added. "If it is three, he absolutely has a chance."