The Twins designated Jackson for assignment Thursday, Dan Hayes of The Athletic reports.
Bradley (9-5) took the loss Thursday against the Phillies, allowing five runs on seven hits and four walks while striking out three over four innings.
Phillips (3-6) took the loss Thursday against the Pirates, allowing four runs on six hits and a walk over 5.1 innings. He struck out six.
The Twins signed Marquez to a minor-league contract Thursday, Dan Hayes of The Athletic reports.
The Twins activated Buxton (hip) from the 10-day injured list Thursday.
Hernandez is absent from the lineup for Thursday's game versus the Pirates.
Ramirez went 2-for-5 with a double, a run scored and an RBI in Wednesday's win over the Pirates.
Junk (6-7) earned the win Wednesday against Pittsburgh, allowing two runs (one earned) on four hits and one walk while striking out two over six innings.
Hernandez went 1-for-3 with a two-run home run and an additional run scored in the 8-2 win over Pittsburgh on Wednesday.
Conine went 2-for-2 with a solo home run, double and two additional runs scored in Wednesday's 8-2 victory over the Pirates.
