The numbers say those players have very legitimate chances to make the NFL when they are thrown into competition against the 250-plus players drafted each year. In 2012, for example, teams signed 622 players who weren't drafted and 98 of them made Week 1 rosters. Another 33 made practice squads. Of the 53 players on Seattle's active Super Bowl roster in 2013, 21 were not selected in the draft.
When the Eagles set their 53-man roster for January's Wild Card weekend game against the Saints, 11 of the players on that roster originally entered the NFL as undrafted rookies.
And then there is this: undrafted players combined to fill out 27 percent of Week 1 rosters in 2013.
The percentages are there, then. A foot in the door means the world for NFL players, drafted or otherwise. So as we wait for next week's Organized Team Activities and a first look at the 2014 Eagles on the field, the understanding is that jobs are open and competition throughout the roster is anticipated.
Who among the team's non-drafted players will earn a roster spot? Who will be like defensive tackle
If any of the rookies make it, they need to follow the same mental blueprint: Give it everything every single day.
"Hard work every day," said Polk. "You know the coaches aren't going to give you anything. You have to earn it and you can't let up. You see how players come and go, so you know that it could be you going if you don't produce every day."
"It's a tough road, but if you love the game and are dedicated to it, you just do it," said Maragos. "You have to stick at it. Every chance you get in practice or in a game, you make the most of it. Coaches are always watching you. You can't let down at all.
"I always had confidence in myself and I knew that if I had enough chances, someone would notice what I did on the field. I love working hard and I love playing football, so I'm glad to be here and I never take it for granted."
The focus at this time of the year is on the Eagles' new, higher-profile additions. The team was aggressive in free agency, signing safety Malcom Jenkins and cornerback Nolan Carroll and trading for running back
His story is similar to the hundreds of players in the league who were not drafted: The talent was always there, but teams just couldn't find a way to use a draft pick on Braman. That didn't bother Braman at all. He just wanted to have a fair shake to make it in the big leagues.
"It doesn't matter how you get here," he said. "Once you're here and you're out on the practice field, it's all about competition. Who works the hardest and who plays the best football?"
The Eagles have 15 rookie free agents on the current roster and all of them have a strong football pedigree and many have fascinating stories.
Pratt knows what he's getting into in the NFL. He has talked to enough players who have made the journey.
"I talked to a lot of guys last year that are in the NFL now,” Pratt told The Trentonian in New Jersey. “They told me, ‘Just keep working, man. Don’t feel out of it if you don’t get drafted,’ because a lot of them didn’t get drafted and they’re doing well in the NFL. They said to keep your head up and keep working."
Do that and only good things will happen. The numbers say anything is possible for players, drafted or not drafted, once they get their chance.