Former Major League Baseball first baseman Mark Teixeira said Thursday he will run for Congress in Texas’ 21st District, seeking the Republican nomination for the seat that three-term GOP Representative Chip Roy is leaving at the end of his term. Teixeira, 45, played 14 seasons in the majors—winning a World Series with the New York Yankees in 2009—and now joins a small but growing roster of professional athletes turning to electoral politics. The Hill Country district, which runs from Austin to San Antonio, is regarded as safely Republican, making the upcoming primary the decisive contest.