. >> 33-year-old inmate herman johnson is doing 12 years for a felony drug conviction. he is currently housed in cellblock 5. >> in here you lose a lot of things on the outside. and you really find out a lot about people by coming to prison, you know. >> paul poplin has been to prison several times over the last ten years for drugs and fighting. >> this is a big cell actually because of the way it's situated with the toilet over here. there ain't much to them. you know. i guess it ain't that bad here, you know. it could be worse. been in worse. >> like being in a cage basically. that's why i try and stay out as much as possible. i go out to the yard and when i come back from eating, i try to avoid mine. that way i'm only in there from 8:30 at night until about 7:30 in the morning. then i'm out the rest of the day. >> donald avila is serving a four-month sentence for parole violation. >> just a bunch of guys living together. somebody's going to get on your nerves, and you're going to get on somebody's nerves one of these days, you know what i mean? >> inmate johnson reca

>> safer: actually, it was a 15- pound baby named herman johnson.hip offer may be a myth, but johnson did grow up to become a 400-pound-guard with a scholarship from lsu. but your football scholarship is just about as rare as your 15- pound baby, and clarkson may love the game but... this is a very... very tough racket? >> clarkson: there's no question it's tough. but it's no different than from the... the person that wants to be an actor. you know, they go to school for that, and chances are they're going to be serving coffee at starbucks or someplace. >> safer: do you prepare them for disappointment? >> clarkson: you don't ever really prepare for disappointment. i think what you try to do is you're preparing them for multiple choices, so that, you know... hey, look, you're always taught as a quarterback, "we go to the line of scrimmage and we see one thing, but we have to be prepared to change the play." >> how did quarterback guru steve clarkson react when his own son wanted to play football? go to 60minutes.com to find out. sponsored by pfizer.