The Phillies optioned struggling left handed reliever Jake Diekman to Triple-A Lehigh Valley after tonight's loss to the Reds.

Diekman has been very disappointing this season, posting a 6.75 ERA with a 29/17 K/BB ratio over 21 1/3 innings.  The 28-year old looked like a promising power arm in the back-end of the bullpen, hitting 98 on the radar gun and coming at hitters with a sling-shot like delivery.

One guy who could be replace him?

Cesar Jimenez, who has pitched well at Lehigh with a 2.88 ERA in 25 innings after a lackluster spring, posting an era of 4.66 over 9 2/3 spring innings.  Jimenez initially made the team out of spring training, but was sent to Triple-A and accepted his assignment to Lehigh Valley at the start of the season

(CSNPhilly's Corey Seidman talks Phillies and some of the prospects to keep an eye on)