Maurer (knee) has not pitched at any level since June 21.

Maurer, who has been sidelined since late April after undergoing knee surgery, made a rehab appearance for short-season West Virginia on Tuesday. He struck out a batter as part of a perfect nine-pitch frame.

Maurer was reassigned to minor-league camp Tuesday.

Maurer (knee) is listed among the Pirates' pitchers scheduled to take the hill in Thursday's Grapefruit League game against the Phillies, John Perrotto of DKPittsburghSports.com reports.

Maurer has been dealing with a sore right knee and hasn't pitched since Feb. 26, John Perrotto of DK Pittsburgh Sports reports.

Maurer elected to become a free agent Friday after being outrighted off the Royals' 40-man roster.

Maurer allowed three earned runs on three hits to blow the save Monday against the Tigers.

Maurer got a one-out save against the Twins on Friday, working around a hit and a walk to close out Kansas City's 6-5 victory.

Maurer blew a save chance Saturday, allowing one run on two hits and a walk in an inning against the Astros.

Maurer was recalled from Triple-A Omaha on Friday.