PHOENIX — With the season opener drawing near, there’s uncertainty over whether flagship radio station KTRB 860-AM will be broadcasting the A’s games during the regular season.

A source with knowledge of the situation told Bay Area News Group on Friday that negotiations for the A’s to buy KTRB — which is in receivership with Comerica Bank — have hit a major snag. In the fallout, the source said, the agreement between the A’s and the receiver to broadcast games during the regular season also is in jeopardy.

Ken Pries, the A’s vice president for broadcasting and communications, did not return phone calls seeking comment, nor did A’s spokesman Bob Rose.

The A’s sent out a release Friday night saying that “due to technical issues beyond their control,” the games Saturday and Sunday against the Colorado Rockies would not be broadcast on KTRB as originally planned. The games instead will air on mlb.com.

The same release also said broadcasts will resume Monday when the A’s open the three-game Bay Bridge Series against the Giants at AT&T Park. But that doesn’t necessarily guarantee broadcasts will continue once the A’s begin their regular season Friday at home against the Seattle Mariners.

KTRB, a 50,000-watt station, went into receivership in September. The A’s have been negotiating to purchase the station ever since and are thought to be the primary bidder.

According to the source, the receiver is looking for a higher bid than the A’s are willing to offer, and might be threatening to pull games off the air as leverage.

But it’s also very possible that one of the sides could budge and a compromise struck before Friday’s opener to continue airing games.

The A’s sent left fielder Chris Carter to Triple-A Sacramento after Friday’s 10-3 loss to the Los Angeles Angels. Carter — ranked the No. 2 prospect in the organization by Baseball America — was considered a long shot to make the big league club out of spring training. But his progress is worth monitoring closely, as he’s the A’s best power-hitting prospect. The timing of the demotion was surprising, given the A’s break camp Sunday. Manager Bob Geren said earlier this week that every player left probably would head north with the team for the Bay Bridge Series. “I was maybe a little surprised, but it was coming eventually,” Carter, 24, said. “The numbers (in the outfield) weren’t really there for me.” He hit .250 with two homers and nine RBIs in 19 games. But Carter looked shaky in left field, leaving the question of whether the converted first baseman can stick in the outfield. The A’s are committed to Daric Barton at first, and they don’t want to restrict Carter to designated hitter duty. “I think he runs well enough and I think he throws well enough,” Geren said of Carter’s prospects in the outfield. “Those are the toughest components to teach. The other stuff can be taught.”