The Twins reinstated Martin (hamstring) from the injured list Thursday.
The Twins optioned Gonzalez to Triple-A St. Paul on Thursday.
Walters underwent a right elbow UCL repair with an internal brace Wednesday, Tim Stebbins of MLB.com reports.
Lowe went 1-for-4 with a two-run home run during the Guardians' 9-5 loss to the Orioles on Wednesday.
Griffin (15-5) took the loss against the Orioles on Wednesday, allowing eight runs on seven hits and two walks while striking out four across 2.1 innings.
DeLauter went 2-for-5 with a two-run home run during the Guardians' 9-5 loss to the Orioles on Wednesday.
Matthews (9-10) took the loss Wednesday as the Twins fell 7-2 to the Tigers, coughing up five runs on two hits and four walks over 2.1 innings. He struck out two.
DeLauter (wrist) will start in right field and bat second in Wednesday's game against the Orioles.
Jeffers is not in the lineup for Wednesday's game in Detroit.
Gomez struck out one in a perfect ninth inning Tuesday to record his 22nd save of the season in a 3-2 win over the Tigers.
