When you're a rookie in the NFL, you're new to a lot of things. You haven't yet established yourself on the team among a group of veterans as you were in college.

Thus, there is hazing.

At Buffalo Bills training camp, 2015 second-round pick Ronald Darby underwent an initiation on Wednesday night. He was taped to the goalpost and drenched in ice water by his teammates. All in good fun, of course.

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It may seem like a rough way to be initiated into the team, but there have been a lot worse through the years. Being cold for a few minutes is better than having half of your head shaved for a few weeks.

No one will ever forget Tim Tebow's rookie haircut. People will forget Darby getting doused in cold water.

(h/t Twitter)