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“He has a competitive temper,” Proefrock said. “He’s not that way in social settings.”

With Halladay and Lannan out, the Phillies have turned to Tyler Cloyd and Jonathan Pettibone to fill the void. Halladay, Cole Hamels and Cliff Lee have a combined seven wins this season.

Proefrock said Zambrano was sincere in wanting to prove he keep his emotions in check _ and get batters out.

“We got positive feedback from everyone who has interacted with him recently,” Proefrock said. “We’re just looking to add some depth and some experience.”