Prior to Start Friday

On the disabled list since spring training, pitcher Mark Prior is scheduled to make his season debut Friday for the Chicago Cubs against the Pittsburgh Pirates.

After being sidelined because of an inflamed right Achilles’ tendon and sore right elbow, Prior was impressive in his third rehab start Sunday.

“I’m not going to go out there and throw a complete game by any means on Friday,” Prior said. “There will be some restrictions, but given the situation, I think it’s the right time.”

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Houston Astro pitcher Andy Pettitte went back on the 15-day disabled list because of a strained muscle in his left forearm. Pettitte was hurt Wednesday during a game against the Chicago Cubs. He’s eligible to be activated June 11.

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Boston shortstop Nomar Garciaparra went two for three for triple-A Pawtucket in his second minor league rehabilitation game. Garciaparra has been sidelined by a bruised right heel.

There is still no timetable for his return to the Red Sox.