Wuertz, 34, was inked to a minor-league deal with a Spring Training invite in January. His chances of making the Marlins' bullpen weren't great, as he battled with injuries all of 2012 and posted a not-so-great 6.68 ERA in 33⅔ innings the year before, but with Miami's thin overall roster it seemed like he might have a shot.
More Marlins: No One a Roster Lock in Miami
The right-hander appeared in just one game this spring -- working a scoreless inning -- which was apparently enough for Miami to know that he didn't have a future with the club.
Several other Marlins are leaving big-league camp along with the veteran right-hander -- including left-handers Scott Maine and Adam Conley -- but Wuertz is the only player not to be reassigned to a minor-league affiliate.
There's still a chance that Wuertz latches on to another club on a minor-league deal, considering he owns a career 3.71 ERA and 9.6 K/9 rate over 414⅓ innings in eight seasons with the Cubs and Athletics, but it's not a sure thing.