Barreto was promoted to Triple-A Nashville on Wednesday.
The A's brought up Joey Wendle from Nashville on Wednesday, so Barreto will take his place on the Sounds' roster over the final 12 days of the season. The top prospect in Oakland's system, Barreto won't turn 21 until Feb. 27, so the fact that he has already reached Triple-A is an extremely rare feat. He uses super quick wrists and strong forearms to really impact the ball, especially to the pull side. Barreto got off to a slow start at Double-A this year, but he is hitting .339/.392/.484 with three home runs and 14 steals (on 21 attempts) in 45 games since the All-Star break.