Cubs sent LHP Gerardo Concepcion outright to Low-A Kane County.

He's now off the 40-man roster. A Cuban defector, Concepcion was a disaster in his first year in the states, putting up a 7.39 ERA over 12 Low-A starts.

Cubs recalled LHP Gerardo Concepcion from Low-A Kane County.

A Cuban defector, Concepcion was a disaster in his first year in the states, putting up a 7.39 ERA over 12 Low-A starts. He figures to return to the level in 2013.

According to CBS Sports' Danny Knobler, scouts who have seen Cubs prospect Gerardo Concepcion pitch have come away "totally unimpressed."

"They're trying to tell people it's just mechanics -- that he needs to get straightened out," one scout said. "But if he was in a junior college game you were at, you'd leave." Concepcion, who signed a five-year, $6 million contract in March, is 2-6 with a 7.39 ERA in 12 starts this season.

Cubs prospect Gerardo Concepcion allowed seven runs in less than an inning Monday at Low-A Peoria.

That marks back-to-back rough outings for Concepcion, who surrendered five runs in his first professional start last week. The 20-year-old Cuban left-hander was signed to a five-year, $6 million contract in mid-March. He will have to begin making some adjustments.

Cubs prospect Gerardo Concepcion allowed five runs in five innings Wednesday at Single-A Peoria.

It was the Cuban defector's professional debut. Fighting jitters, he allowed five runs in a rocky first inning but settled in with four scoreless after that. The 20-year-old left-hander is likely to make a slow but steady climb through the Cubs' farm system.