Buchter (shoulder) was credited with the win in Triple-A Nashville's victory over Round Rock on Thursday, allowing a hit, uncorking a wild pitch and recording a strikeout over a scoreless seventh inning.
Joyce (back), who went 2-for-4 with a double, a walk and a run in Triple-A Nashville's win over Round Rock on Thursday, is 6-for-12 with two walks and two runs in three minor-league rehab games. He's slated to come off the disabled list Friday and could fill the 26th man slot in the first game of the Athletics' doubleheader against the White Sox, Susan Slusser of the San Francisco Chronicle reports.
Lowrie, who went 2-for-5 with a two-run home run and two runs overall in a win over the Padres on Wednesday, is now hitting .391 (9-for-23) with two doubles, two homers, five RBI and four runs during his current five-game hitting streak.
Casilla, who fired a scoreless inning in which he recorded two strikeouts in an extra-innings win over the Angels on Sunday, has logged 3.2 scoreless frames across three outings since returning from the disabled list with a shoulder injury.
Buchter (shoulder) threw a scoreless inning for Triple-A Nashville on Saturday and could rejoin the Athletics in either Chicago or Detroit during their upcoming road trip, Susan Slusser of the San Francisco Chronicle reports.