Houston Rockets owner Leslie Alexander had already pledged $4 million but announced he'll up his donation to those affected by Hurricane Harvey to $10 million.
Alexander is not alone. Several sports teams and athletes have been pitching in to help after Hurricane Harvey.
The owners of the NFL's Texans, MLB's Astros and NBA's Rockets have pledged millions of dollars toward relief efforts.
Texans defensive end JJ Watt started raising money for victims and beat his original goal of $200,000 in two hours. By Tuesday afternoon, money was coming in so fast that he raised the goal to $2 million.
"Houston, stay strong. We are with you," Watt said. "We're going to do everything that we can to make sure that you guys get back on your feet."