Colin Kaepernick 49ers
Colin Kaepernick watched from the sidelines for a fifth consecutive game as the San Francisco 49ers played the Arizona Cardinals at Levi's Stadium in Santa Clara, California, Oct. 6, 2016. Getty

Former San Francisco 49ers quarterback Colin Kaepernick on Wednesday announced that he completed the last phase of his #MillionDollarPledge campaign, which he started in October 2016. Kaepernick vowed to reach the million-dollar goal of donating to charities that serve oppressed communities across the nation.

As part of the campaign, Kaepernick challenged his friends from the worlds of sports and entertainment to donate $10,000 to a cause of their choice, to which he would later match with another $10,000. More than a year after he started the campaign, Kaepernick reached his goal with the help of singer Usher.

"It has been an honor for me to serve the people with my #MillionDollarPledge. The thanks and gratitude from each organization has been immense. Being able to learn and see how each organization used the donations was a key part of the Pledge. I wanted to make sure that every dollar was going towards making real change in our communities," the NFL star wrote on Facebook.

"Thank you to everyone who has supported me, matched me and my pledge and most importantly the people. I know that we still have a lot of work to do, however, by getting everyone involved, I truly believe that we can all achieve and move mountains towards our goals for Social Justice," he added.

Kaepernick and Usher teamed together to donate $20,000 to Helping Oppressed Mothers Endure (H.O.M.E.), an organization in Atlanta that helps single mothers during economic hardship.

"I wanted to recognize and also support an organization that I felt is amazing for single mothers in Atlanta," Usher said in a video Kaepernick shared on his Twitter page.

"This was an opportunity to do something amazing and you did it. You have raised your million dollars. I’m happy to be a part of that completion of that million dollars. This is a result of us helping each other. We all become stronger," he said.

Colin Kaepernick
Kaepernick received the Sports Illustrated Sportsman of the Year Award in New York, Dec. 5, 2017. Slaven Vlasic/Getty Images for Sports Illustrated

Other celebrities who joined Kaepernick in the #10for10 challenge include Serena Williams, Chris Brown, Jhene Aiko, Snoop Dogg, Steph Curry, rapper TI and Jesse Williams.

Kaepernick also said that in addition to the $1 million, he would also donate all the proceeds from his 2016 jersey sales to charities. The 30-year-old, who sparked a controversy for kneeling during the national anthem at one of his games in 2016 as part of a protest against police brutality, had a net worth of $22 million in 2016. Majority of Kaepernick's money can be attributed to his NFL contracts.

Kaepernick, who was born on Nov. 3, 1987 in Milwaukee, Wisconsin, began his professional football career as a backup quarterback to Alex Smith. He later became the 49ers’ starter in the middle of the 2012 season. In June 2014, his great performance was rewarded with a six-year extension deal worth $126 million. However, he earned just $40 million of his contract as he opted out of the contract in March 2017 to become a free agent.