According to Alex Speier, the Red Sox have decided on the two other coaches they plan to interview to be Boston's next pitching coach under manager John Farrell. Randy St. Claire, the current pitching coach for the Miami Marlins, and Steve Foster, the Kansas City Royals bullpen coach, will be interviewed along with Rick Peterson and Juan Nieves, who we already knew about. St. Claire will be interviewed on Thursday.
St. Claire is one of the last vestiges of the Montreal Expos, as he was their pitching coach (as well as that of the Washington Nationals) from 2003 through 2009. He's been with the Marlins ever since, but Miami is now in a similar situation to Boston: with manager Ozzie Guillen out, and a new manager on the way in, the coaches have all been allowed to look for a new gig just in case they aren't retained.
St. Claire started his playing career with the Expos, as he was signed as an amateur free agent back in 1978. He made his big-league debut in 1984, and pitched nine years in the majors, totaling 252 innings as a reliever. The St. Claire's are a baseball family, as Randy is the son of former backstop Ebba St. Claire, and the brother of Steve St. Claire, who was also in the Montreal system in the 80s.
As for Foster, he pitched in the majors from 1991 through 1993, and then spent 1994 in the minors. He became a scout with the Tampa Bay Devil Rays in 1996, and bounced between that role and coaching at the collegiate level. In 2007, he became the Marlins bullpen coach, but left for the same gig with the Royals before St. Claire came to town.