Monday July 21st, 2014

Miami Marlins closer Steve Cishek could be on the trading block as the team's playoff chances are starting to slip away, reports CBS Sports' Jon Heyman.

The Marlins enter the week with a 45-52 record and are 8.5 games back of the Washington Nationals in the NL East. They have lost seven of their last 10 games.

Cishek is having a good season, with a 4-5 record, 3.57 ERA and 21 saves in 24 opportunities.

More from CBS Sports:

With Huston Street off the market after being traded to the Angels, and Jonathan Papelbon's contract fairly unpalatable, Cishek may be considered the top current closer on the market -- barring Boston more seriously considering a deal for superstar closer Koji Uehara.

MORE MLB COVERAGE: 10 bold predictions for the rest of the MLB season |  Marlins' second-half preview

General manager Dan Jennings said the team will not be trading All-Star outfielder Giancarlo Stanton or third baseman Casey McGehee.

- Scooby Axson

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