Brown is the seventh player in team history to score 50 and the fourth Celtic to reach 50 points and 10 or more rebounds in a game.
Newcastle named former Bournemouth manager Eddie Howe as the replacement for Steve Bruce on Monday.
Brown tested positive for COVID-19 three weeks ago, and unfortunately, there's really no telling when he might be back to 100 percent.
The pair combined for 71 points—41 for Jason Tatum and 30 for Jaylen Brown—to lead the double digit comeback effort.
We're not even in the regular season yet, and it seems as if new Boston Celtics head coach Ime Udoka is establishing his own authenticity.
Celtics guard Marcus Smart was suspended for Friday's preseason game against the Miami Heat, because he missed the team flight.
Celtics big man Al Horford tested positive for COVID-19 on Tuesday days after Jaylen Brown was also tested positive.
Due to a positive test, Brown will have to quarantine for at least 10 days, which means he's done for the remainder of the preseason.
Odsonne Edouard arrives in south London having scored three goals already in the 2021/22 Scottish Premiership.
Leicester City have been drawn to face Napoli in the Europa League group stage. The Foxes will also face Spartak Moscow and Legia Warsaw.