When they were in the NFL together, Panthers center Ryan Kalil and former teammates Jordan Gross (2003-14) and Geoff Hangartner (2005-13) got so fed up with the rookies that they created a handbook to teach new guys the ways of being a pro. Now that handwritten how-to is an actual book, The Rookie Handbook, and it covers so much more than how to buy a suit or find a seat on a plane amongst the veterans. Pro tips: don't put glue in a mouthpiece, and take an umbrella with you next time you go into a bathroom stall.
Listen Up, Rookies
