Though they failed to pull the trigger on an earlier deal for A's reliever Jim Johnson, it appears the the Marlins continue to remain interested in Oakland's struggling former closer, according to sources. One player the A's have discussed with the Marlins as a possible trade return: Marlins minor league pitching prospect Adam Conley.

After posting 50-save seasons each of the previous two years for Baltimore, Johnson (see stats here) hasn't come close to matching his success in Oakland, which landed him in a trade with the Orioles in December but would now like to trade him before the July 31 deadline. Johnson has a 6.25 ERA and only two saves in 37 relief appearances for the A's, eventually losing the closer's role to Sean Doolittle.

Conley, the Marlins' second-round pick in 2011, has struggled this season at Triple A New Orleans. The left-hander has gone 3-5 with a 6.00 ERA in 12 games (11 starts). Conley missed some time earlier this season with elbow tendinitis.

According to Ken Rosenthal of Foxsports.com, the Marlins and A's nearly had a deal in place early last month for Johnson. The Marlins would have sent their Competitive Balance pick in the draft (No. 39 overall) to the A's for Johnson, according to Rosenthal, before shifting gears and sending that pick to Pittsburgh for Bryan Morris, instead. The Marlins used the money the saved on that pick to sign Kevin Gregg.

Johnson is making $10 million this season, after which he becomes eligible for free agency.