According to sfgiants.com...

The Giants tweaked their bullpen on Wednesday by optioning right-hander Brad Hennessey to Triple-A Fresno and recalling right-hander Billy Sadler from the same club.

Sadler, 26, had excelled in 11 appearances with Fresno, posting a 1.13 ERA as opponents hit only .138 (8-for-58) off him. He also had 24 strikeouts in 16 innings, reflecting the command of his fastball, curveball and changeup that Bochy cited.

I think that it is about time Hennessey got sent down to fix whatever is wrong.  I'm surprised he still had an option left, seems as though nobody on the Giants roster has any.  Sadler has experience as a starter so he can also be a spot stater if needed.  I'm a fan of this move

Sadler was issued jersey No. 34, most recently worn by left-hander Steve Kline, whose uninhibited behavior contrasted with Sadler's polite, subdued nature. Asked if he was worried about acquiring some of Kline's traits, Sadler laughed and said, "I did think about that."

Oh wait never mind, Sadler now has no chance as helping out the ball club.