Dustin Pedroia was scratched from Double-A Portland‘s lineup Saturday.

He was in the initial lineup but then was replaced by second base prospect Brett Netzer hours before the Sea Dogs’ 1 p.m. start.

This comes after Pedroia pulled himself from his rehab game Friday after four innings. Manager Alex Cora said last night Pedroia felt discomfort in his knee.

“He didn’t feel right,” Cora said after the Red Sox‘s game in Houston on Friday. “No slides, no hits. He didn’t feel right after the second one. He decided that was enough today.”

Boston placed Pedroia on the injured list April 18 because of left knee inflammation.

The Red Sox returned him from his first rehab assignment without activating him after he was scratched from a game with Portland on May 11 because of knee soreness.

He has appeared in just nine games for the Red Sox since the start of the 2018 season after undergoing a left knee cartilage restoration procedure Oct. 25, 2017.

He also had scar tissue removed during an arthroscopic surgery in late July 2018.