. >> the 49ers host the cardinals on thursday playing without star linebacker allen smith who announced he will go into rehab after getting arrested on suspected d.u.i. abc7 news reporter matt keller is at 49ers headquarters in santa clara. matt? >> the 49ers are struggling on-and-off the field as the team has a short week at their training facility as they get ready for thursday night's game. san jose police arrested aldon smith on friday after he crashed into a tree. that was second d.u.i. arrest. he addressed the media after playing yesterday against the colts. he apologized to his team and family and everyone he let down. he is taking an "indefinite" leave and seeking treatment. this is the right decision according to the fans. >> what he has done may have affected him mentally can his team mades, so, maybe the best thing for the team right now. >> hopefully he is not gone too long, get really and get healthy and come back as quick as possible. >> smith had five tackles yesterday in the game and the decision to play was widely criticized but the 49ers c.e.o. defended the move saying