This just in: J.A. Happ will remain in the rotation.

GM Ruben Amaro Jr. told the media that he's sticking with the rookie left-hander, who fired his second shutout of the season Wednesday night, despite Pedro Martinez's likely addition to the roster this month.

"Happ's not going anywhere," Amaro said. "He's not going out of the rotation. He deserves to stay in the rotation. He's pitched very well and he's one of our most effective starters."

Happ is is 8-2 with a 2.74 ERA. Only five National League pitchers — Chris Carpenter, Tim Lincecum, Matt Cain, Dan Haren and Wandy Rodriguez — have lower ERAs.

He is 6-2 with a 2.80 ERA in 14 starts since being promoted to the rotation five weeks into the season.

Amaro has not made a decision yet on where Martinez will pitch next.

"I think his effectiveness was enough to perhaps warrant him pitching in the major leagues, but we haven't made any final decisions yet," Amaro said.