White Sox lose ugly without manager Rick Renteria

DETROIT — Manager Rick Renteria stayed in Chicago for further tests while the White Sox opened a seven-game trip Thursday afternoon in Detroit.

He didn’t miss much. James Shields allowed three home runs, and the Sox put on a bad baserunning display in a 7-2 loss to the Tigers.

Renteria, who was hospitalized before the game against the Twins in Minneapolis on Monday after complaining of lightheadedness, returned to Rush University Medical Center for a second day of tests, the Sox said.

“He’s still dealing with lightheadedness, which was the cause of why he went in the first place; they’re trying to figure out what’s going on,’’ said bench coach Joe McEwing, who was managing the team for a fourth consecutive day in Renteria’s absence.

“I talked to him this morning, and he’s doing well. He’s in good spirits and sounded great.”

The Sox are 48-79 but have won 11 of their last 20 games, including two of four with McEwing in charge. They were held scoreless for six innings by left-hander Matthew Boyd, and when they did get something going offensively, they shot themselves in the foot. Boyd picked off Yolmer Sanchez in the third inning, and Tim Anderson made the third out of the fifth inning on a single by Ryan LaMarre with Sanchez rounding third.

“Once Sanchez rounded [third], he looked back, he saw the play developing to third, and he kind of slowed down,’’ McEwing said. “We talked to both of them about it, and they took full responsibility.”

Jose Rondon homered, and Adam Engel doubled twice.

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Castillo off suspended list, on DL

Catcher Welington Castillo was put on the 10-day disabled list with right-shoulder inflammation the same day his 80-game suspension for violating MLB’s drug policy expired. Castillo, who will likely be a September call-up when rosters expand, was sent to Class AAA Charlotte on a rehab assignment Aug. 17.

Burr-fect debut

Right-hander Ryan Burr retired all four batters he faced in his major-league debut, striking out Mikie Mahtook after falling behind 3-0 in the count to end the seventh and striking out Mike Gerber to end a perfect eighth.

“Everything you could have ever wanted,’’ Burr said. “You think about it your whole life, and then it happens. It’s crazy. I thought I was going to balk when I came in; I was shaking a little bit. But I finally settled down.’’