Dukes, who was demoted in June, was hitting .288 with three homers and 10 RBI in 19 games for the Chiefs. He walked nine times and stole five bases while only striking out eight times.
Sosa was 1-2 with a 2.79 ERA with three saves in 20 games, four starts, for Syracuse. He struck out 53 and walked in 13 in 48 1/3 innings.
In seven big league seasons, with four different teams, Sosa is 40-49 with a 4.67 ERA.