Giolito got roughed up in his last start for Double-A Harrisburg, giving up six earned runs on five hits and four walks while striking out four over three innings.
His ERA jumped from 2.87 to 5.30 thanks to Wednesday's outing, which was by far his worst of the season. His 17:14 K:BB in 18.2 innings shows that he's not even ready for a promotion to Triple-A, let alone the big leagues. A pitcher with Giolito's raw talent can turn things around in a hurry, however, so he could still be up this summer if a spot were to open up in the big league rotation. That said, if a spot opened up in May or early June, Austin Voth would be the intriguing prospect to keep an eye on, as he has earned a look thanks to a great start at Triple-A Syracuse.