OAKLAND -- Giants starter Johnny Cueto experienced forearm tightness during his rehab start Monday with Class A San Jose, potentially slowing down his expected return to the rotation. San Francisco hoped he could be available this weekend against the visiting D-backs.
The former All-Star completed three innings, throwing 34 pitches (26 strikes). San Francisco initially expected Cueto to throw roughly 70 pitches in a rehab start that he lobbied for. But he left after allowing two hits, walking one and striking out four.
The Giants placed the righty on the disabled list shortly after the All-Star break with blister-related pains on his three middle fingers.
"It looked like he was throwing the ball well. … He felt something in the forearm," Giants manager Bruce Bochy said after his team's 8-5 loss to the A's on Monday night. "That's why he was shut down."
The Giants plan to evaluate Cueto on Tuesday.
Jonathan Hawthorne is a reporter for MLB.com based in the Bay Area. This story was not subject to the approval of Major League Baseball or its clubs.