The Edwin Jackson experiment didn't work

When the Marlins signed Edwin Jackson in January, they likely thought they were going to be able adjust his delivery enough to ensure he thrives in Miami.

Some of that might have been the result of information from Jim Benedict, known as a "pitching guru". But Jackson didn't have a rough 2015 campaign. Over 55.2 innings, he pitched to a 3.07 ERA.

At the time, it seemed to be a low-risk, high-reward type of deal for the Marlins. He was signed for just more than $500,000 and was set to compete for a starting job.

Since the Marlins added Wei-Yin Chen on a five-year deal, Jackson wasn't needed in a starting capacity. However, it appeared Miami was confident he would be a valuable addition to the bullpen.

But that wasn't the case.

Over 10.2 innings with the Marlins, Jackson pitched to a 5.91 ERA and 5.93 FIP. He didn't allow a run in his first three relief appearances. In his final two, though, he allowed a combined six runs.

In order to make room for lefty Mike Dunn on the roster, the Marlins designated Jackson for assignment Tuesday. On Saturday, the club announced he has been granted his unconditional release.

Things haven't been easy for the Marlins' bullpen, which opened the season without Dunn and Carter Capps. Bryan Morris is also on the disabled list, forcing the Marlins to rely on their depth.

Miami's bullpen ERA sits at 10th in the National League, but overall, the unit has proven to be productive. However, the Marlins could seek relief help leading up to the non-waiver trade deadline.

When the Marlins decided to add Jackson, it seemed there was a good chance he would pitch well as a reliever. That didn't end up happening, and the Marlins decided to part ways with him.

The Edwin Jackson experiment failed, but the Marlins realized it relatively quickly.