The Chicago White Sox are 2 1/2 games out of a playoff spot, but even if they make it, Robin Ventura may not be there to embark on the postseason run.

After jumping out to a 23-10 start this season, the club has since dropped down to .500, leaving Ventura under fire within the organization, according to MLB Network's Jon Heyman.

"I think patience has been showed," one White Sox representative told Heyman. General manager Rick Hahn declined to comment.

Ventura's first season with the club was in 2012, when he replaced the outspoken and abrasive Ozzie Guillen. Dubbed the "anti-Ozzie" in the report, the White Sox hoped his low-key, out-of-the-spotlight personality would carry the team to glory.

After winning 85 games in his first go-around, the White Sox have won 63, 73, and 76 games in each of the following years.

Bench coach Rick Renteria appears to be the front-runner for the job, according to the report. Renteria was fired when the Chicago Cubs saw an opportunity to hire Joe Maddon.

But now that he's with Chicago, Heyman's sources say it makes sense.

They are "as prepared as they’ve ever been," the club insider said.