Sterner will serve as the opener in Wednesday's game against Minnesota.

Sterner has allowed eight runs (seven earned) in one combined inning across his last three appearances, so the A's will now see if a role change might help him get back on track. He likely won't last more than an inning before handing things off to Jeffrey Springs, who's expected to pitch in bulk relief.

The Rangers optioned Heuer to Triple-A Round Rock on Wednesday.

Heuer is being sent down to clear a spot on the active roster for Kumar Rocker (shoulder), who was reinstated from the 15-day injured list ahead of his start Wednesday against the Rays. The reliever allowed one run over 1.1 innings in his lone appearance with the big club.

The White Sox transferred Castro (knee) from the 15-day injured list to the 60-day IL on Wednesday.

The move frees up a spot on the 40-man roster for right-hander Ryan Cusick, whom the White Sox claimed off waivers from the Tigers. Castro will miss the rest of the season after undergoing surgery Tuesday to repair a torn patellar tendon in his right knee.

Shuster will serve as the White Sox's opening pitcher for Wednesday's game against the Tigers, Kyle Williams of the Chicago Sun-Times reports.

Shuster will draw an opener assignment for the second time in less than a week, after he tossed a scoreless inning last Friday against Baltimore. The southpaw has maxed out at three innings over his 17 appearances between the White Sox and Triple-A Charlotte this season, so he could be called upon to give Chicago a little more length in his second turn as an opener. The White Sox haven't announced their plans for once Shuster exits the contest, but righty Mike Vasil could be a candidate to work as a bulk reliever.

Wilson surrendered eight earned runs on 12 hits and one walk while striking out two over five innings of relief in Monday's 13-1 loss to the Tigers.

Since being called upon to make his fifth start of the season May 24 against the Rangers, Wilson has shifted back to the bullpen with Adrian Houser having taken control of the final spot in the rotation. After his most recent start, Wilson faced three batters in relief in last Wednesday's win over the Mets before he was tasked with mopping up Monday's blowout loss after starter Jonathan Cannon was tagged for five earned runs over three innings. Cannon was placed on the injured list a day later due to a back injury, but the White Sox aren't expected to immediately turn back to Wilson to fill the vacancy in the rotation. Instead, the White Sox will opt for a bullpen day in Wednesday's game against the Tigers, with lefty Jared Shuster likely to cover anywhere between 1-to-3 innings before being followed by a slew of relievers.

Brogdon struck out two batters in one perfect inning of relief against the Red Sox on Tuesday.

The contest was tight throughout, and Brogdon helped preserve a 3-3 tie when he breezed through a 1-2-3 frame in the seventh. The right-hander was blown up for four runs over two-thirds of an inning in his third appearance of the campaign May 11, but he hasn't given up an earned run in any of his seven appearances since. During that span, Brogdon has posted a 6:1 K:BB and allowed just three hits across 6.2 frames, though he hasn't seen much high-leverage work and doesn't yet have any holds or save chances.

Triple-A Salt Lake placed Silseth on its 7-day injured list May 20 due to an unspecified injury.

Silseth hadn't pitched since May 3 before Salt Lake placed him on the IL just over two weeks later. The 25-year-old righty maintains a spot on the Angels' 40-man roster but has spent all season in the minors after falling short in his bid for a spot in the big club's rotation during spring training. Prior to getting hurt, Silseth had logged a 4.45 ERA, 1.49 WHIP and 29:22 K:BB in 28.1 innings over his seven starts at Triple-A.

Fairbanks threw a scoreless ninth inning without allowing a baserunner Tuesday against the Rangers.

The Rays were up by four runs, so it was not a save chance for Fairbanks. However, he hadn't appeared in a game since May 24, so the appearance was good for some needed work. Fairbanks has turned in six consecutive scoreless appearances while racking up a 6:3 K:BB in that span.

Bigge (lat) is no longer feeling soreness but remains shut down from throwing, Marc Topkin of the Tampa Bay Times reports.

Bigge had a setback with his right lat strain two weeks ago, so the Rays are taking things more slowly this time around. The right-handed reliever should be cleared to throw before long and will eventually need a rehab assignment. Bigge has been sidelined since early May.

McDaniels (biceps) was sent to Triple-A Salt Lake on Tuesday to continue his rehab assignment.

McDaniels made three appearances in the rookie-level Arizona Complex League, allowing two runs (one earned) with a 7:3 K:BB over 4.1 frames. The lefty reliever has been out for more than a month with biceps tendinitis, but his activation from the 15-day injured list should come soon.