Its always hard to fit into a new team, and for an NFL rookie the slightest mix up can see you pitted against more seasoned veterans.
However, away from the rumoured hazing and bullying that takes place within teams throughout the league, there is the other friendly side of it.
Where pictures and videos that people would find funny in the real world are released of their NFL heroes.
Now it looks like the St Louis Rams have provided us with the newest video to make us watch and laugh.
Pictures and videos of team-mates sleeping is quickly becoming a big trend within NFL camps and the Rams players have provided a new one.
The video, uploaded to Rams Defensive Lineman Chris Long's Instagram page shows rookie Offensive Lineman Greg Robinson asleep in a fairly impressive situation.
Not only is Robinson in his team jersey and protective vest, there is also music blaring and the cameraman takes the camera right up to his face.
As if that wasn't impressive enough, Robinson appears to be asleep, in his locker which of course is no easy task.
Posted with the tagline "game week doesn't faze my bro", Long shows that the Rams players are clearly in good spirits ahead of the new NFL season.
His hashtag may be leaving it somewhat late however as he writes '#wakemeuponsunday' which will ensure that Robinson is well rested, but he may miss a fair bit of training.
Dreaming of Vikings?
As I'm sure we're all aware, the new NFL season begins on Thursday night as the Pittsburgh Steelers travel to take on the Seattle Seahawks.
Most of the NFL however has to wait until Sunday to see their teams in action and St Louis is no different.
The Rams host the Minnesota Vikings on Sunday at the Edward Jones Dome in one of the - lets be honest, less than flattering games of opening weekend.
There are not many outside the states of Missouri or Minnesota who expect the Vikings or Rams to make the post-season.
The Rams have an arguably comfortable opening to the season as they face games against the Vikings, Tampa Bay Buccaneers and Dallas Cowboys in the firs three weeks.
All teams who struggled last year, but then it takes a bad turn for St Louis who then face a run of four play-off teams from last year in five games with two games against the San Francisco 49ers.
The Rams will need to get off to a good start against Minnesota on Sunday before their dangerous run.