Jackson was pulled in the sixth inning of his start Thursday due to muscle cramping and spasming, but manager Rick Renteria told MLB.com the issue was likely related to hydration. His next start is set for Tuesday against the Rockies at home.
Polanco was playing for Minnesota in June - just days before his 21st birthday - and smacked two hits in five at-bats.
Gibson was scratched from Saturday's start because of a back issue, He tossed 10-15 pitches in the bullpen, and could return to the rotation as early as Tuesday against the Royals in Kansas City.
The move frees up a spot on the 40-man roster for Jerome Williams. Williams is expected to start for the club Friday. Marks posted a 5.03 ERA over three minor-league clubs.
Ron Gardenhire has expressed optimism that
Hughes could certainly use a shot in the arm instead of one to the shin. He has yielded 12 earned runs on 25 hits in his last 15 innings pitched to send his ERA soaring to 4.10, its highest point since May 4.
Bo Porter has confirmed that
McHugh was performing poorly after a fine stretch before going down. He gave up 10 earned runs in 17 innings pitched in his last three starts - all losses. In fact, he has not posted a victory since June 3.
Morales was reacquired by Seattle, and was expected to hit in the middle of the order. Kyle Seager moved down to the fifth spot to accomodate Morales. In 154 at-bats, Morales is hitting .234/.259/.325.
It took all of one day for
Montero did not take advantage of his brief time with Seattle, going 0 for 3 Thursday.