Joe Jackson's family plays charity softball game in his honor

The family of Joe Jackson is paying tribute to their late patriarch. 

Over the weekend, a few of Joe's children and grandkids stepped out for the Dee Dee Jackson Foundation's Celebrity Softball Game in Encino, California, a Jackson family source exclusively tells ET.

The source tells us that Joe's wife, Katherine, was in attendance, along with their son, Tito, and two of his kids, TJ, 40, and Taj, 44. Prince, the 21-year-old son of the late Michael Jackson, was also there, playing alongside celebrities like former NFL pro Terrell Owens and MMA star Chuck Liddell.

Prince later shared a few pics from the charity event to his Instagram Stories:

Instagram Stories
Instagram Stories

According to the source, Katherine watched the game from the stands as family members Prince and TJ participated in the softball game. The source says TJ gave a brief speech at the end of the game in which he spoke sweet words about Katherine. "Grandma, you know how much you mean to us," he said. "We love you with everything we have."

The game was all in honor of Joe, who died on June 27 following a battle with pancreatic cancer. He would have turned 90 on July 26.

As previously reported, ET learned just weeks ahead of Joe's death that his health had taken a turn for the worse. A Jackson family source told ET at the time that he was in a Las Vegas hospital with terminal cancer. According to the source, Joe had been battling the illness for a while and doctors told members of the family that he had limited time to live because the cancer could not be treated.

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Stars react to the death of Joe Jackson
THE MAN...THE FAMILY ...THE LEGEND! RIP JOE JACKSON and thank you for giving us the many gifts of talent from your… https://t.co/fV6dzec44M
Joe Jackson took his 6 sons and 3 daughters from Gary, IN to the world. He made icons that are still impacting the… https://t.co/VGIY5cUsBh
R.I.P. joe Jackson the legend we will never forget
One time for the iconic black daddy, Joe Jackson. RIP.
RIP JOE JACKSON
RIP Joe Jackson. A tough, uncompromising, charming & complex man who drove his children from the mean, poor street… https://t.co/5tfyiXtKWN
R.I.P Mr Joseph “Joe” Jackson. Thank you for greatly influencing our musical history & culture through your family… https://t.co/7FS8WIjU03
RIP Joe Jackson
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