Clark, who also had 30 points, reached the milestone with her sixth rebound - and the game was still in the first quarter.
At the next stoppage, Clark was presented with a plaque honoring the accomplishment. They didn't, however, let her take home the ball.
Clark is just 100 points shy of 1,000, and Mullen hopes to use the same ball for that occasion. After that, it's all hers.
Elsewhere in the Tri-County Conference:
Gloucester used a balanced effort to down visiting Pitman, 59-24. Alisha Fox scored 14 points and Mackenzie Cooper and Kylee Hirst each had 13. Cooper also had five rebounds, four assists and three steals.
Salem held host Pennsville to seven first-half points in a 48-17 victory. Tiasia Tatem scored 12 points, and Kayla Robinson had 10.
Olympic American. Isabella Therien sank two free throws with less than a second remaining to lift Cherokee past Lenape, 44-43. Therien, who scored 20 points, went 7 for 8 from the line.
Kylie Giedemann scored 17 of her 24 points in the first half, and host Washington Township cruised to a 65-40 win over Cherry Hill East.
Olympic Patriot. Timber Creek shrugged off a rough first quarter to blitz host Cherry Hill West, 61-32. Timber Creek trailed by eight after the first quarter, but outscored Cherry Hill West, 53-16, the rest of the way. Brittany Martin, who scored 27, and Amanda Riff, who had 12, combined to make seven three-pointers.
Winslow Township overcame 20 second-half points from Erica Snow to win at Seneca, 64-55. Jade Matthews led Winslow Township with 22 points. Snow finished with 29.
Cape-Atlantic National. Kennedy Johnson's 22 points and 20 rebounds powered host Wildwood Catholic to a 68-45 win over Cedar Creek. Olivia Rulon added 19 points.
Cape-Atlantic United. Making her first start, Phoebe Carano scored a career-high 20 points, and St. Joseph beat visiting Atlantic County Tech, 65-15. Dana DiRenzo had 12 points, 17 rebounds and five assists.
Colonial. Haddon Heights used a strong first quarter to first quarter to jump out to a big lead and cruise to a 53-34 win at Gateway. Ashley Reynolds scored 14, and Jynazha Davis and Nadja Riggs each added 13. MacKell Schultes led Gateway with 19.
South Jersey Invitational. Four Camden Catholic players scored double digits in a 75-21 rout of visiting Delran. Julia Braungart scored 21, Erin Campbell had 11, and Sierra Taylor and Tialah Thorton had 10 each.