For football fans, it’s been a season filled with upsets, dramatic game-deciding calls from referees – and politics.

President Trump set his sights on the National Football League this 2017 season when he lashed out at athletes who protest the national anthem before games.

The response from the NFL and its players was swift and unavoidable as games have brought opposing teams together, united against a common opponent: the president.

Read on for a look at Trump’s gripes with the sport.              

State of the NFL

During Trump’s first State of the Union address – less than a week before Super Bowl LII – Trump seemingly took a jab at those who protest the national anthem.

While acknowledging White House guest Preston Sharp, a young boy who had organized a campaign to put American flags on veterans’ graves, Trump said the actions “reminds us why we salute our flag, why we put our hands on our hearts for the Pledge of Allegiance and why we proudly stand for the national anthem.”  

Trump takes on Roger Goodell

Trump said NFL Commissioner Roger Goodell “lost control of the hemorrhaging league,” on Twitter.

“Can you believe that the disrespect for our Country, our Flag, our Anthem continues without penalty to the players,” Trump said on Nov. 24. “The Commissioner has lost control of the hemorrhaging league. Players are the boss!”

Marshawn Lynch’s defense

After Trump publicly criticized Oakland Raiders’ running back Marshawn Lynch on social media, his mother and his coach’s wife jumped to his defense.

Trump said on Twitter that Lynch should be suspended for the remainder of the football season if he does what he did before Sunday’s game: sit in protest during the playing of the national anthem but stand for Mexico’s anthem.

Delisa Lynch, the football player’s mother, fired back, hitting the president for his past failures to become an NFL team owner.

And Linda Del Rio, the wife of Raiders Coach Jack Del Rio, reportedly said on Twitter, “President Trump I voted for you, which I now regret. Football is a powerful platform – here’s the charitable work we did in Mexico City #NFLproud.” Her account appears to have been deactivated.

Pence out of the game

Vice President Mike Pence attended the Indianapolis Colts game in his home state in October – but not for very long.

Pence and his wife walked out of the game after players from the San Francisco 49ers kneeled during the national anthem.

Trump later tweeted that he was “proud” of Pence and his wife, Karen, for leaving the stadium.

Jerry Jones’ play call

Dallas Cowboys owner Jerry Jones said his players must stand for the national anthem – if they don’t want to remain seated on the bench for the game.

“I know this, we cannot … in the NFL in any way give the implication that we tolerate disrespecting the flag,” Jones said Sunday after his team’s loss. “We know that there is a serious debate in this country about those issues, but there is no question in my mind that the National Football League and the Dallas Cowboys are going to stand up for the flag. So we’re clear.”

When pressed on other signs of protest, such as players holding up a fist at the end of the song, Jones reiterated that “if there’s anything that is disrespectful to the flag, then [they] will not play.”

Cowboys gain ground with Trump

Along with Jones, the Cowboys briefly knelt together before the national anthem. But when the “Star-Spangled Banner” played, the Cowboys stood with locked arms. The Arizona Cardinals did the same.

“The booing at the NFL football game last night, when the entire Dallas team dropped to its knees, was the loudest I have ever heard. Great anger,” Trump tweeted.

“But while Dallas dropped to its knees as a team, they all stood up for our National Anthem,” he continued. “Big progress being made – we all love our country.”

Trump has said that he had spoken to Jones, calling him a “winner who knows how to get things done.” He also said athletes “will stand for our Country!” 

Sarah Sanders takes a shot

White House press secretary Sarah Sanders defending Trump’s comments on the NFL and its players, saying it’s “always appropriate for the President of the United States to defend our flag, to defend the national anthem and to defend the men and women who fought and died to defend it.”

Sanders also suggested athletes protest “the [police] officers on the field who are protecting them instead of the American flag.” 

Race versus respect

Trump said that his issue with athletes’ protests was about “respect” for the U.S. and not race.

“The issue of kneeling has nothing to do with race. It is about respect for our country, flag and national anthem. NFL must respect this!” he said.

Brady breaks Trump’s tackle

Despite his oft-reported friendship with Trump, New England Patriots quarterback Tom Brady said he disagreed with the president’s remarks on the NFL.

“I certainly disagree with what he said. I thought it was just divisive,” Brady said.

Game time decisions

After the president’s speech and tweets, multiple NFL teams and players decided to take a stand – by taking a knee or remaining in the locker room during the Sept. 24 games.

The Pittsburgh Steelers, Seattle Seahawks and Tennessee Titans all remained in their locker rooms while “The Star-Spangled Banner” played.

Pittsburgh Steelers offensive tackle and former Army Ranger Alejandro Villanueva (78) stands outside the tunnel alone during the national anthem before an NFL football game against the Chicago Bears, Sunday, Sept. 24, 2017, in Chicago. (AP Photo/Nam Y. Huh)

Pittsburgh Steelers offensive tackle and former Army Ranger Alejandro Villanueva (78) stands outside the tunnel alone during the National Anthem before an NFL game against the Chicago Bears Sunday, Sept. 24 in Chicago.  (AP Photo/Nam Y. Huh)

Steelers head coach Mike Tomlin said the decision was made by the team “not to be disrespectful to the anthem, but to remove ourselves from this circumstance.” However, Alejandro Villanueva, an offensive tackle and former Army Ranger, was outside when the anthem began to play and stood alone.

Multiple teams, including the Baltimore Ravens and Jacksonville Jaguars, took a knee or locked arms during the national anthem.

Baltimore Ravens head coach John Harbaugh, second from left, links arms with his daughter Alison, left, and players during the playing of the U.S. national anthem before an NFL football game against the Jacksonville Jaguars at Wembley Stadium in London, Sunday Sept. 24, 2017. (AP Photo/Matt Dunham)

Baltimore Ravens head coach John Harbaugh stands with his arms locked with his daughter and players during the playing of the National Anthem before their game against the Jacksonville Jaguars in London.  (AP Photo/Matt Dunham)

And while the locked arms was meant to be a display of unity among NFL players, Trump tweeted his support for the gesture.

“Standing with locked arms is good, kneeling is not acceptable. Bad ratings!” he said.

Trump tweeted a total of six times that Sunday about the American flag and protests.

Trump tackles athlete protesters

While in Alabama to campaign for a Republican special Senate election candidate, Trump took a moment to slam athletes who kneel in protest during the national anthem.

“Wouldn’t you love to see one of these NFL owners, when somebody disrespects our flag, to say ‘get that son of a b—- off the field right now, out, he’s fired,'” Trump said to cheers.

“You know, the NFL ratings are down massively, massively,” Trump said as he railed against the league’s officiating on certain tackles. “A referee gets on television, his wife is sitting at home, she’s so proud of him. They’re ruining the game.”

Trump accused “those people taking a knee” during the anthem of “hurting” football and encouraged people to “leave the stadium” if just one player protests.

Buffalo Bills come up short

Before he became president, Trump owned the New Jersey Generals of the now-defunct United States Football League. Trump pushed for the league’s games to be played in the fall, in competition with the NFL, and was widely blamed for the collapse of the league.

After the USFL folded in 1985, Trump unsuccessfully tried to become a NFL team owner.

Trump lost a bidding war to become the Buffalo Bills’ new owner in 2014. He was outbid by Terry Pegula, 66, who reportedly paid $1.4 billion for the team.

Trump decried the NFL and the team on Twitter multiple times after losing the ownership fight.

“The [NFL] games are so boring now that actually, I’m glad I didn’t get the Bills. Boring games, too many flags, too soft!” Trump said on Oct. 13, 2014.

Kaitlyn Schallhorn is a Reporter for Fox News. Follow her on Twitter @K_Schallhorn.