PHILADELPHIA – The Phillies told Chris Young last week that he will not return next season as pitching coach, and they formalized the move on Thursday.

It is unclear if Young will remain with the organization, but a source said he has been offered an opportunity to stay. Other coaches on manager Gabe Kapler’s staff have been told they will return in 2020.

The Phillies will be seeking new pitching and hitting coaches this offseason, as Charlie Manuel will resume his role as senior advisor to the general manager. He filled the role vacated by John Mallee in August as a favor to Phillies managing partner John Middleton.

The Mets recently dismissed manager Mickey Callaway, who was a pitching coach with the Indians. He could be a candidate to replace Young. Recently dismissed Pirates pitching coach Ray Searage and former Phillies pitching coach Rich Dubee are two other intriguing candidates.

The Phillies’ pitching staff struggled in its first season under Young, who replaced Rick Kranitz last fall. Philadelphia dealt with a rash of injuries in the bullpen, but its rotation stayed mostly healthy and struggled, finishing ninth in the National League in strikeout rate (21.6 percent); 10th in xFIP (4.59); 11th in ERA (4.64) and walk rate (8.3 percent); 13th in fWAR (7.6) and home runs per nine innings (1.61); and 14th in FIP (4.91). By contrast, the 2018 rotation ranked third in FIP (3.76); fourth in strikeout rate (24.1 percent), walk rate (7.6 percent), xFIP (3.77) and WAR (14.0); sixth in home runs per nine innings (1.07) and 11th in ERA (4.12).