I really thought this was his last year, but I can't believe his career ends tonight. You can say, he should not play in the preseason, but this would have happened sometime this year.
What happened was Romo started to slide and the guy hit him from behind before his butt made contact with the field; the hit cause Romo to come STRAIGHT down and instead of sliding he pretty much came down hard on his behind, this might have jammed his lower back.