Halvorsen was removed from Saturday's game against Pittsburgh due to an apparent injury, Patrick Saunders of The Denver Post reports.

Halvorsen entered in a non-save situation, taking over in the ninth inning with Colorado up 8-4. He tossed only five pitches, working the count on Spencer Horwitz to 3-2, before being pulled. It's not clear what caused Halvorsen's exit, though the Rockies may have an update after the game. The 25-year-old had settled in as the team's closer, tallying five saves in five chances in July. Rookie Dugan Darnell took over for Halvorsen on Saturday, but if the latter needs to miss time, Victor Vodnik -- who has 11 saves over the past two campaigns, including two this year -- could be the lead candidate for ninth-inning duties.

Akin walked two and struck out two in a scoreless ninth inning Saturday to record his first save of the season in a 4-3 win over the Cubs.

With Felix Bautista (shoulder) on the IL and the O's having shipped out their other established high-leverage arms at the trade deadline, the closer job is wide open. Corbin Martin got the save Tuesday but worked the sixth inning Saturday with Baltimore in a 3-0 hole, while Yennier Cano handled the eighth and Akin got the ninth with lefties Michael Busch and Kyle Tucker due up for the Cubs. Interim manager Tony Mansolino may elect to play matchups and go with a closer committee unless someone emerges from the pack, but Akin's fantasy appeal will grow even if he gets only a share of the save chances.

Cruz was removed from Saturday's game against the Blue Jays with right shoulder discomfort, Anne Rogers of MLB.com reports.

Cruz gave up a hit and a walk in the seventh inning before his shoulder forced him to leave the game without recording an out. There's no word yet on the severity of his injury, but the Royals should offer some more details after they get a closer look at him.

The Red Sox transferred Guerrero (elbow) to the 60-day injured list Saturday.

Guerrero landed on the injured list in late June with a strained right elbow, and his move to the IL will ensure he remains on the shelf until at least Aug. 27. He'll also cede his spot on the 40-man roster to Nick Burdi (hip), who was reinstated from the 60-day injured list Saturday and optioned to Triple-A.

The Red Sox reinstated Burdi (hip) from the injured list Saturday and optioned him to Triple-A Worcester.

A bruised foot caused Burdi to land on the injured list June 3, but a hip injury suffered at Worcester caused him to move to the 60-day IL. He'll now come off the IL following a minimum-length stay, though the Red Sox will keep him in the minors for the time being. The 32-year-old has thrown 5.1 shutout innings for Boston this season and sports a 1.23 ERA through 22 Triple-A frames.

The Red Sox reinstated Kelly (oblique) from the injured list Saturday and optioned him to Triple-A Worcester.

The Red Sox originally sent Kelly down to the minors in late June, but his option was rescinded when he landed on the injured list with an oblique injury. Now that he's been given a clean bill of health, he'll head down to Triple-A once more and serve as organizational bullpen depth.

Urena will start Sunday's game against Cleveland, Bobby Nightengale of The Minnesota Star Tribune reports.

The 33-year-old righty will be filling in for Simeon Woods Richardson, whom the Twins will give a few extra days of rest before his next start. Urena has pitched to a 5.40 ERA and 1.53 WHIP across 18.1 innings between the Dodgers, Mets and Blue Jays this season, and he'll likely aim to get through three or four frames Sunday before turning the game over to Minnesota's bullpen.

The White Sox reinstated Scholtens (elbow) from the injured list Saturday and optioned him to Triple-A Charlotte.

Scholtens has been on the shelf all season while working his way back from the Tommy John procedure he underwent last March. He posted a 5.25 ERA and 1.31 WHIP over 36 innings between High-A and Triple-A during his rehab assignment, and he'll officially remain in Charlotte as organizational depth now that he's fully recovered.

The White Sox Sox" data-type="SPORTS_OBJECT_TEAM" data-league-abbreviation="MLB" data-team-abbreviation="CHW">White Sox recalled White from Triple-A Charlotte on Saturday.

Since being sent down to Triple-A in late June, White has allowed 11 runs (10 earned) over 17 innings across four starts. Despite his subpar performance, he'll come up from the minors to make up for the loss of Dan Altavilla (lat). White will presumably take on a long-relief role out of the bullpen.

The White Sox placed Altavilla on the 15-day injured list Saturday with a right lat strain.

Altavilla gave up one run in just one-third of an inning during his appearance Friday, and it appears he came away from his outing with a lat injury. He'll now be forced to miss at least the next 15 days while he recovers, and the White Sox will bring up Owen White from Triple-A Charlotte to fill the void in their bullpen.