Davo's right. It actually happened just last year. The not-so-often used Brian Scalabrine of the NJ Nets got called into a game and didn't take his warmups off till he got to the scorers table, only to find out that he didn't have his jersey on underneath it. That's the only recent one that comes to mind, but I could see it happening to a lot of people who just were never called in and remained uncaught. Easy on the kid though- I'm sure he's nervous about PT, his place in the overcrowded Forward Rotation, and the fact that he's being called on to stop Chris Webber. Thats a lot going on for a 20 year old.
Thanks, davo, I knew someone would know if this has happened before. Also, thanks, HP, for bringing up a name that I thought I would never hear again in Doc Ellis. I remember hearing about that no-hitter. I believe that Doc also came to the ballfield with his hair in curlers one time.