A shooting, canceled concert, and yes, the Sox: Another dark day at Guaranteed Rate Field

A very bad week for the White Sox took an even worse turn Friday night.

After the White Sox were booed off the field following a 12-4 loss to the Athletics at Guaranteed Rate Field, even more boos came.

A postgame concert featuring Vanilla Ice was abruptly postponed due to "technical difficulties."

In reality, there was a shooting in the outfield seats during the game. The shooting apparently happened somewhere in the left field bleachers, ABC 7 Chicago reported. A fan told the station he saw a woman bleeding a couple of rows in front of him and two, maybe three people were shot, then where whisked away by security.

Chicago police confirmed only that there was a shooting and said they would release information later Friday night. The White Sox have not commented.

While falling to Oakland - which has the worst record (38-91) in baseball - starter Dylan Cease allowed 9 runs (8 earned) on 9 hits and 5 walks in 4⅓ innings.

"I didn't really command much today," Cease said. "It didn't seem like much worked. Lot of walks, lot of hits, lot of runs."

The A's put up 5 runs in the second inning with the help of some sloppy defensive play by left fielder Andrew Benintendi and third baseman Yoan Moncada.

"The whole thing is frustrating," manager Pedro Grifol said. "We've got to get better, that's plain and simple. It's not for lack of trying. These guys are out there doing their work. We've just got to get better. There's no excuses. It's not Major League Baseball. We've got to tighten up."

Fresh faces:

The Sox are carrying eight rookies on the active roster: starter Jesse Scholtens; relievers Gregory Santos, Edgar Navarro, Lane Ramsey and Sammy Peralta; catcher Korey Lee; infielder Lenyn Sosa; and outfielder Oscar Colas.

The White Sox are playing the fourth-highest number of rookies in MLB behind Cleveland (10), Kansas City (nine) and Oakland (nine).

Scary moment:

In the sixth inning, White Sox relief pitcher Tanner Banks hit Oakland's Seth Brown in the right ear flap of his helmet with a 91-mph fastball.

Brown got up to his feet and walked slowly to first base, and he was back out in right field in the bottom of the sixth before coming out of the game.