NEW YORK — Randy Niemann is becoming the New York Mets' bullpen coach for the third time, and Razor Shines was hired as third-base coach under manager Jerry Manuel.

Howard Johnson (hitting coach), Dan Warthen (pitching coach), Sandy Alomar Sr. (bench coach) and Sandy Alomar Jr. (catching instructor) will return. The first-base slot remains open.

The Mets said today they are reassigning bullpen coach Guy Conti, third-base coach Luis Aguayo and first-base coach Ken Oberkfell. Conti had been bullpen coach for four seasons.

Niemann is entering his 22nd year with the Mets and was bullpen coach from 1997 to mid-1999 and 2000-02. He spent the past two years as minor league rehabilitation coordinator.

Shines had been manager of the Philadelphia Phillies' Clearwater farm team, leading it to a 64-76 record in the Class-A Florida State League. He was third-base coach of the Chicago White Sox in 2007.