Urena has thrown live batting practice, and is ready for a rehab outing.
One thing that may sidetrack some pitchers is the weather. Storms are sweeping through South Florida, and they may disrupt some throwing schedules at Roger Dean Stadium in Jupiter, Fla.
Cosart is slated to throw 75-80 pitches on Tuesday for the Hammerheads. If that goes without a hitch, he could be back with the Marlins around Sept. 8-9.
The Marlins currently have five starters on the disabled list -- Jose Fernandez (right biceps strain), Henderson Alvarez (shoulder surgery), Kendry Flores (right shoulder tendinitis), Cosart and Urena.
Alvarez is out for the season.
Also, reliever Carter Capps (right elbow strain) continues to progress. The club is confident the hard-throwing right-hander is fine, but they are being extra cautious, so there is no firm timeline for his return.
The best case for Fernandez is returning in the middle of September.
Flores has been throwing, and is progressing on schedule.
Joe Frisaro is a reporter for MLB.com. He writes a blog, called The Fish Pond. Follow him on Twitter @JoeFrisaro and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.