The 25-year-old Hammers favourite has had a memorable, if at times frustrating, debut season in the English top flight.
And once the Senegalese star started scoring, in a 2-2 draw at Hull City, he literally could not stop.
He went on to score four goals in his first four starts for the club, breaking a 26-year-old record previously held by legend Leroy Rosenior.
When he improved that record to six goals from his first six games against Manchester City a couple of weeks later, Sakho became the first ever West Ham player to perform the feat and in doing so matched Micky Quinn's Premier League record, set in 1992.
The former Metz man, surely the bargain of the season with 12 goals after being snapped up for just £3.5 million, was also awarded the Premier League Player of the Month for October.
But he is already planning to better his tally next time out and says only injuries have stopped him bagging even more goals in East London.
"It's been a successful season, even if I wanted to do better," Sakho told West Ham's official website.
"But with all the injuries that I've had, it’s been a good one and it will enable me to score more next season.
“Even if my aim was to score a few more, as I said, it will help me next season to do everything to at least surpass 12 goals."
It hasn't all been positive for West Ham's top scorer, though. A back injury controversially ruled him out of the Africa Cup Of Nations.
So when he returned while the tournament was still going on and scored the winning goal in the FA Cup at Bristol City, the Hammers were duly fined £75,000.
Sakho was also criticised by some fans of his national team who accused him of choosing club over country. But he immediately penned an emotional open letter defending himself in the wake of their early exit from AFCON.
Further injuries have meant the second half of the season has been very stop-start for the star as the Hammers have tumbled from fourth down to mid-table.
It is also no surprise that Sakho's absence has coincided with the goals drying up for Allardyce's side.
He may yet feature in West Ham's last two games of the season and insists it is important for the club to achieve its aim of finishing 10th.
With little to play for, though, Hammers fans will already be turning their attentions to next season, the last at their famous Boleyn ground.
And they will be hoping Sakho can stay fit to get the goals which will provide the perfect send off before they move to the Olympic Stadium in 2016/17.