Fortunately, few know exactly what Celtics superstar Jayson Tatum is going through after rupturing his Achilles tendon in Game 4 of the East semifinals against the Knicks. One member of the Red Sox does.

On and off the court, Jaylen Brown stepped up as the leader the Celtics needed after Jayson Tatum’s season-ending injury.

While the injury shouldn't derail Tatum's career, it does give the Celtics a major obstacle to overcome. Boston has been to the conference finals five times and has had a pair of NBA Finals appearances—including a win last year—since 2017. Much of that success, especially over the past five or so years, has been largely due to Tatum.