Byron Buxton, baseball's top-ranked prospect, recently aggravated his left (non-throwing) shoulder and will likely miss the remainder of the Arizona Fall League schedule, Twins farm director Brad Steil said late Wednesday. The Twins' prized young center fielder, who displayed his talents in Saturday's nationally televised Fall Stars Game, apparently suffered the setback during Tuesday's game. He did not play Wednesday afternoon for Glendale, but the injury is not considered serious for Baseball America's Minor League Player of the Year. Buxton, 19, recently missed nine days after suffering a strained left shoulder while taking a swing during batting practice. No magnetic resonance imaging exam was taken, and Buxton homered in his first plate appearance upon returning to the lineup. Just seven games remain for Glendale with the regular season due to end Nov. 14. In 12 games against the game's elite prospects, Buxton is batting .212 with three home runs and eight runs batted in. His on-base percentage is just .288 and he has 15 strikeouts, two stolen bases and one double.