Possibly some help to the bullpen.
Rodriguez, 34, has spent 11 seasons in the majors, most recently with the Washington Nationals, with whom he gave up 25 earned runs in his 31 relief outings last season.
Rodriguez spent most of last season on the disabled list with tendinitis in his throwing shoulder, and was hobbled in 2005 with the New York Yankees due to a knee injury.
If Rodriguez can put the last two injury riddled seasons behind him and regain his 2004 form, then great. But if the last two season are a precursor to his future output, well, at least he didn't cost much.
Back when he was good, he was very good. Though that time may have passed him by. Given he was only signed to a minor-league contract - why not see what happens? It can't hurt and it might help.