I`m usually against signing players that are as likely to get hurt as Mike Cameron. However, I thinnk he would be a very good signing if they can't trade for a centerfielder. Cameron is a good hitter for a centerfielder and though its declined, his defense is still above average. Brett Gardner and Austin Jackson both should probably get some major league time anyway so his potential injury isn't a HUGE deal. I doubt he`ll cost much either because of his injury history.
I`d greatly prefer a trade for a guy like David DeJesus. However, Cameron is a better option than trusting Brett Gardner and Melky Cabrera.