Chris Matthews, one of the longest-tenured voices at MSNBC, announced his retirement during Monday’s night’s airing of his talk show, “Hardball.” Matthews, 74, said he and MSNBC had mutually agreed to part ways. The decision followed a series of events that resulted in criticism of the host’s statements about Bernie Sanders, African-American lawmakers, and comments he had made to female journalists and coworkers. “I’m retiring,” Matthews said. “This is the last ‘Hardball’ on MSNBC.” Matthews, a former speechwriter for President Jimmy Carter, has hosted “Hardball” on MSNBC since 1999 and remained a centrist voice on the cable news channel’s prime-time programming, which often features commentary that is further to the left.