They're as much a part of baseball as peanuts and Cracker Jack.

With flavors ranging from barbecue to cracked pepper, sunflower seeds are everywhere on the diamond and dugout, a favorite of players from Little League to Major League Baseball.

“I guess because it's been around for so long, it's kind of what we've always done,” Dodgers manager Dave Roberts told USA TODAY Sports. “But I'm a guilty participant.”

Players explain that chewing seeds during a game is no different than a fan enjoying a hot dog in the stands. There’s just one difference – a fan stands isn’t expected to make a play at shortstop.

If you look closely at the dugout during a game, finding the sunflower aficionados is be easy. Empty sunflower shells lay in a puddle in front of certain players while others chew gum. Packets of seeds are set out in the dugout for whoever’s liking.

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Here’s everything you need to know about sunflower seeds and baseball, from the origins to players' favorite flavors.

How did sunflower seeds become a part of baseball?

In the 1950s, the Hall of Fame duo of Stan Musial and Enos Slaughter began chewing sunflower seeds during games to pass time. But it didn’t really catch until superstar Reggie Jackson made it famous in the 1970s. In 1980, he preached the benefits of sunflower seeds to Sports Illustrated.

“The nutritional value is meaningful,” Jackson said. “Sunflower seeds have protein, thiamine, niacin, iron, magnesium, phosphorus. We have to take phosphorus pills to keep from pulling muscles.” 

Being one of the more popular players in baseball, fans and other players started to pick up on Jackson’s habit.

Why do players chew sunflower seeds?

Through the years, chewing seeds has become a tradition in its own right, a way to pass the time for players.

Giants pitcher Sean Manaea, who called chewing seeds “a fun mouth exercise,” said he and his teammates sometimes flick sunflower seeds high in the air to try and catch them in their mouths.

“It never usually works out – except for that one time that does that it's really cool,” he said.

Infielders or outfielders can sneak a pack of seeds in their back pocket but those on the mound don’t have that luxury.

And whereas position players are often out on the field every game, pitchers have off days. It’s then that those seeds start to come in handy.

“When you’re a starting pitcher, you have four days off to rest and watch the game. You need those seeds, you need that gum, need some coffee, maybe a little bit of water,” Rockies pitcher Chase Anderson said. “We like to sit back and be the best teammates we can. Sunflower seeds definitely help out with that.”

For White Sox infielder Jake Burger, seeds calm his nerves. He doesn’t always chew them while at the plate, but if he’s looking to change his luck, he might pop some in. Tigers infielder Javy Báez keeps an entire bag of seeds in his back pocket – he even has his own flavor of the David brand.

Dodgers infielder Miguel Rojas uses seeds to focus. He acknowledged that when playing short, not every ball is going to be hit to you, so there’s a lot of time where you’re doing nothing. Chewing seeds can help in those moments.

“I feel like I use it for that reason, like the reason that I just keep myself taking [the seeds] out of my back pocket and put it in my mouth, and that kind of keeps me in the moment,” Rojas said. “Instead of thinking about [it] way too much. And they taste really good too.”

Nutrition aside, getting that taste of sunflower seeds is a major reason why players chew them.

Favorite flavors

Whether they prefer the original sunflower seed or want to mix it up, there’s plenty of options for baseball players to choose from.

Rojas and Burger lean toward dill pickle flavored seeds, a popular one across baseball. Dodgers manager Dave Roberts is more of an original seed guy. Anderson enjoys pickle, but also barbeque flavor.

“I used to be original but I’ve kind of ventured off in my old age and tried new flavors,” the Rockies pitcher said.

Rojas also enjoys bacon ranch flavored seeds – which made nearby teammate David Peralta cringe – but Rojas admitted his consumption of the flavor has to be limited.

“They're kind of salty and I have to kind of lay back on those for a second. Be careful with them,” he said.

And if a player has a sweet tooth, well there's a seed for that.

Manaea recently found himself chewing cinnamon toast flavored seeds, unlike anything he had tried before.

“I never heard of dessert flavored seeds, always just like savory kind of flavor, you know?” Manaea said.