The up-and-coming 23-year-old shooting guard has a strained ankle tendon and is questionable for Friday’s game against his old team.
Hart played through the injury during Thursday’s 109-105 win over Cleveland Cavaliers after briefly having to leave the court.
But his performance clearly suffered, as he picked up just four points and four rebounds.
Originally the number 30 pick in the 2017 NBA Draft by the Jazz, Hart was traded to the Lakers along with number 42 pick Thomas Bryant in exchange for number 28 pick Tony Bradley.
“My favourite NBA couple”
And the Maryland-born player is quickly establishing himself as a core part of the Lakers.
In 17 games including three starts, Hart has averaged 10.6 points and 3.9 rebounds in 26.1 minutes.
Josh, who studied at Villanova University in Pennsylvania, is dating nursing student Shannon Phillips.
In an interview, Josh explained how Shannon and he had managed to make long distance work while based on opposite sides of the country.
He said he always makes sure to “FaceTime with his girlfriend” every night before bed.
Curvy babe Shannon recently shared a throwback picture of the couple while they were at university with her 3.6k Instagram followers.
“#TBT to the college daysss,” she captioned the cute snap.
Fans were quick to praise the picture.
Angie commented: “My favourite NBA couple. Just two down to earth humans in love.”
Shannon, a student at University of Maryland School of Nursing, is a sporting star in her own right.
She played basketball for the University of Maryland, which may explain why she has been so understanding of Josh travelling to the other side of the country while following his NBA dreams.
Lakers take on Utah Jazz at 7.30pm Pacific time (3.30am Saturday morning GMT).