The AL Central-leading White Sox Tweeted the news late Saturday night after the Twins beat the Cleveland Indians and Chicago won in Texas.
Liriano was an all-star in 2006 and was expected to be one of the Twins' top starters before undergoing reconstructive elbow surgery later that same year. He threw a no-hitter last season, but has been inconsistent throughout his career.
The 28-year-old Liriano is 3-10 this season with a 5.31 ERA in 22 appearances — 17 starts. He was demoted to the bullpen in mid-May when his ERA was 9.45.
Escobar, 23, is hitting .207 (18 for 87) with four doubles and three RBIs in 36 games for the White Sox.
Hernandez is also 23. He has split time at double- and triple-A this year, going 8-2 with a 2.94 ERA. He made his big league debut against Boston on July 18 and allowed eight runs in four innings.