Colin Kaepernick's decision not to stand for the national anthem apparently has made his San Francisco 49ers jersey very popular.

The league's 33rd best seller on draft day in April, Kaepernick's jersey has moved to the number one spot in the league over the past week.

Before moving to number one, it had been the seventh best seller in the NFL over the past week and third among quarterbacks behind Cam Newton and Tom Brady, according to DICK's Sporting Goods Jersey Report.

The 28-year-old's jersey is currently priced at $99.99 for a men's size on the 49ers' apparel website for the NFL. It's unclear exactly how many Kaepernick jerseys have been sold since he started the protest.

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Colin Kaepernick has come under fire from some people offended by his decision not to stand during the national anthem before San Francisco's games in protest of racial injustice

Since making the decision, his San Francisco 49ers jersey has become very popular. The league's 33rd best seller on draft day in April, Kaepernick's jersey has moved to the number one spot over the past week

His jersey (above) is currently priced at $99.99 for a men's size on the 49ers' apparel website for the NFL. It was on clearance at the end of last season, as Kaepernick was coming off a horrible year with the team

The jersey was on clearance at the end of last season, as the backup quarterback was coming off a horrible year with the team. In the last week alone, the amount of Kaepernick's team gear sold was more than the past eight months combined, according to ESPN.

The 49ers backup quarterback, who wouldn't stand for the anthem during the team's preseason games, has cited racial injustice and police brutality among the many reasons for his protest and said he plans to continue into the regular season.

Many have weighed in on the controversial decision, including President Obama who said he supported the NFL star.

While speaking after the G20 Summit in Hangzhou, China, the president said that the 49ers quarterback is 'exercising his constitutional right' by not standing during the national anthem for his team's preseason games in protest against racial injustice in the country.

Kaepernick has come under fire from some people offended by his decision not to stand during the national anthem before San Francisco's games.

Obama said that since he's been in China, he hasn't been paying attention to football or following the issue closely.

Colin Kaepernick (middle) kneels down during the national anthem on September 1 during a preseason game

Obama (above) said that he supports the NFL players decision on Monday. The president said: 'My understanding is that he's exercising his constitutional right to make a statement'

'My understanding is that he's exercising his constitutional right to make a statement,' Obama said in response to what the NFL player is doing.

'There's a long history of sports figures doing so, I think there are a lot of ways you can do it.

'As a general matter, when it comes to the flag and the national anthem and the meaning that that holds for the men and women in uniform and those who've fought for us, that is a tough thing for them to get past to then hear what his deeper concerns are.

The president added that he doesn't doubt Kapernick's sincerity.

'I think he cares about some real legitimate issues that have to be talked about,' Obama said.

'He's generated more conversation around some topics that have to be talked about.

U.S. soccer star Megan Rapinoe (pictured) knelt during the national anthem Sunday night before the Seattle Reign's match with the Chicago Red Stars in the National Women's Soccer League

You've heard me talk about in the past for the need for us to have an active citizen.

'I'd rather have young people who are engaged in the argument... than people who are just sitting on the sidelines and not paying attention at all.'

Obama said that maybe some of the people who are criticizing the football player will eventually start seeing that 'he has a point.'

'My suspicion is that over time he's going to refine how he thinks about it and maybe some of his critics will start seeing that he has a point,' the president said.

'That's how we move forward, sometimes it's messy but it's the way democracy works.'

Several other athletes have fallen Kaepernick's lead since the controversy ignited US soccer star Megan Rapinoe knelt during the national anthem Sunday night before the Seattle Reign's 2-2 tie with the Chicago Red Stars in the National Women's Soccer League.

Seattle Seahawks player Jeremy Lane (left and circled above) refused to stand during the national anthem ahead of the team's game with Oakland on September 1

Rapinoe, 31, said it was an intentional move designed to show her support for San Francisco 49ers quarterback Colin Kaepernick's ongoing protest against racial injustice in the U.S.

'It's the least I can do. Keep the conversation going,' Rapinoe tweeted, after earlier telling American Soccer Now it was 'a nod to Kaepernick'.

Rapinoe is a midfielder for Seattle Reign FC in the National Women's Soccer League - the highest women's club competition in the U.S.

The football player was joined by teammate Eric Reid in kneeling, and Seattle Seahawks cornerback Jeremey Lane sat down during the playing of the national anthem at another preseason game last week.

Kaepernick, 31, explained his decision not to stand for the anthem after the 49ers final preseason game last week.

'I'm not anti-American. I love America. I love people. That's why I'm doing this,' he said.

'I want to help make America better, and I think having these conversations helps everybody have a better understanding of where everybody is coming from.

'We have a lot of people that aren't treated equally, that aren't given equal opportunities.