Deus - Clearly you are naive about depression and suicide. Either that or you're a sociopath, but I'm going to give you the benefit of the doubt. Depression and suicidal thoughts aren't something that you can turn off like a light switch and they go away. Depression is a disease that can be treated, but never cured. And the suicidal thoughts can come and go depending on how depressed you are. And macho guys like football players don't like to acknowledge their vulnerabilities for fear of being thought weak.
If you're a "FRIEND" as Incognito claimed, you don't sit there and LEAD the incessant harassment of the guy who confided in you that he had been thinking about committing suicide previously, regardless of what the reason was. Why? Because that reason can quickly become you and lead that person to actually commit the act.
You sit him down. You talk. You listen. You support. You lay off the things that you KNOW have upset him because he's told you to stop. You change your manners towards him so that your teammates cool it on the things that obviously upset him (talking about his sister).
You sit there and claim others are naive, but it is clear to anyone that you are the naive one when it comes to depression and suicide.