Buehrle, a Type B free agent, has been the Sox's Opening Day starter nine of the past 10 seasons and has spent his entire 12-year career in Chicago. The owner of a no-hitter and a perfect game, Buehrle has compiled a 161-119 career record with a 3.83 earned-run average and a 1.28 walks/hits per inning pitched mark.
The 32-year-old lefty went 13-9 last year with a 3.59 ERA and pitched over 200 innings for the 11th consecutive year.
Juan Pierre, meanwhile, was not offered arbitration after his second year with the club. Last season, the 34-year-old outfielder batted .279 with 80 runs scored and 27 stolen bases -- his lowest total since becoming a full-time player in 2001.
The .296 career hitter has also played for the Rockies, Marlins, Cubs and Dodgers and owns 554 stolen bases, the most among active players.