BOSTON -- Knuckleballer Steven Wright still is experiencing soreness in his left knee.

The Red Sox placed Wright on the 10-day disabled list June 26 with knee inflammation.

Wright underwent a cartilage restoration procedure in his left knee in May 2017. It was the same surgery Dustin Pedroia underwent last October.

"Not having a great day," Red Sox manager Alex Cora said. "So he's been throwing, all that. But he's still sore. ... It's taking longer than expected."

Cora said he's unsure whether Wright will remain in Boston to continue his rehab and receive treatment when the Red Sox return from the All-Star Break next Friday or if he'll make the trip to Detroit and Baltimore.

"He'll have good days and then he takes a few steps back," Cora said.