In Milwaukee, six different branches of the military -- including the Wisconsin National Guard and Wisconsin Air National Guard -- combined to throw out ceremonial first pitches before the Brewers game against Miami.
In Atlanta, a pregame flyover by four T-6 Texans, a training plane used in World War II and the 1950s, highlighted the festivities.
St. Louis played host to a special edition of the Star Spangled Banner that saw an A cappella group of service men and women called 4-Digit Chord sing the anthem. There was also a hot dog eating contest that Coney Island's would be proud of.
"It certainly is something fans get excited for," Cardinals manager Mike Matheny said before the game. "They know it's America's pastime, and day to celebrate our freedom and a lot of things that we take for granted. For me, there's no better way to celebrate than watching a game of baseball. We always have great turnouts and it's a good day at the baseball park."
After the top of the first inning in Los Angeles, a Dodger fan currently stationed in Afghanistan surprised his wife with a video message displayed for the entire crowd.
Dodgers manager Don Mattingly said had mixed feelings as to playing on July 4.
"As a player, it was always the one day that was kind of weird because as a kid you grow up with picnics and fireworks and hanging out with your family and as players we're here," he said. "Then I look at the NBA and they are playing on Christmas, it's part of it. For us to be part of the past time and thinking about our independence of our country, it's kind of cool."
Before the D-backs game against the Padres, 25 families representing each branch of the military lined the outfield grass for armed forces appreciation. Then, nearly 50 civilians took their oath of enlistment on the right-field warning track.
In Detroit, the Tigers donated 1,000 tickets to local military members and veterans to bring their families and enjoy a Fourth of July evening at the ballpark.
In Seattle, U.S. Army Sergeant Corrin Campbell sang the national anthem. Campbell has been in the U.S. Army for five years, but has also led a double life of sorts as a singer. She has performed for troops in Iraq and opened for Ted Nugent and Toby Keith on their USO tour through Baghdad.
"It's a remarkable gathering of all of us," Campbell said. "No matter where we stand politically, socially, economically, we all come together and remember that 267 years ago or whatever it was, we were able to decide a conscious way to live our lives."
John Schlegel is a national reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.