Niemann was on the coaching staff of newly hired Red Sox manager Bobby Valentine, who worked with Niemann as the Mets manager from 1997 through 1999.
Niemann figures to assist new Red Sox pitching coach Bob McClure. The hire fills out the team's coaching staff, with hitting coach Dave Magadan, bullpen coach Gary Tuck and bench coach Tim Bogar remaining in the organization, and third base coach Jerry Royster and first base coach Alex Ochoa joining Niemann as newcomers. (via WEEI)
Niemann spent 24 years with the Mets organization, coaching at every level possible. Rob Bradford of WEEI.com writes that Niemann "gained some notoriety during a game against the Yankees in '10 when he engaged in a confrontation with New York closer Francisco Rodriguez."