Croydon's Team GB Olympian Lawrence Okoye has announced he will sign for NFL franchise the San Francisco 49ers.

It is yet another remarkable career move for a 21-year-old who has already played rugby at Twickenham with Whitgift School, competed in a home Olympic Games, and won a place to study law at Oxford University.

The former Croydon Harrier is the British discus record holder and made the Olympic final last summer but finished a disappointed 12th.

Despite being tipped as a future world and Olympic champion, he walked away from the sport and switched to American football in the States having impressed at a trial.

The 21-year-old was not selected on the final day of the NFL draft. But he revealed on Twitter he was joining the 49ers as an undrafted free agent.

He tweeted: "Proud to announce that I will be signing with the San Francisco @49ers!!!!!!!!!!!!!!"

Okoye, who turned down offers to play rugby union and was also accepted to study law at Oxford University, initially said he intended to carry on with the discus and aim for Rio 2016.

But he subsequently decided to swap to American football and wowed scouts at the Super Regional Combine despite having never played the sport.

According to reports he will sign a three-year deal with the 49ers and will play on the defensive line.

Earlier this year he said he speculated about returning to discus throwing.

He said: "I do not intend to quit athletics completely.

"The best age to be a discus thrower is your late 20s. In the Olympic final that was the average age.

"I fully intend to return to throwing the discus when my hopeful football career ends, which could well be around the same time."