San Francisco Giants bench coach Ron Wotus took full advantage of manager Bruce Bochy's absence Saturday by adjusting the music during batting practice.
But Bochy, and country music, are likely to return on Sunday.
The World Series champions said they expect Bochy back in camp, three days after undergoing a heart procedure.
"If everything goes well for him, I expect him,'' Wotus said. "That's a real possibility.''
The 59-year-old Bochy was released from the hospital late Friday. He had two stents inserted into arteries leading to his heart a day earlier.
The Giants' medical staff began to monitor Bochy's heart after he experienced discomfort following a physical exam on Wednesday. He was sent to Scottsdale Healthcare Medical Center, directly across the street from the team's spring training facility.
Bochy, who has guided the Giants to three titles in five years, wasn't around as Bruce Springsteen played over the camp loudspeakers while Wotus supervised the team for a second straight day.
"Well, Boch usually gives me a hard time because I put the Boss on,'' Wotus said, smiling. "In the past he's said, `You're going to have to change that music. It puts me to sleep.' He doesn't like it.''
"So when Boch wasn't here, we put Bruce Springsteen on the last couple days,'' he said.
Wotus said he texted Bochy with updates from the workout Friday and expected to do the same later Saturday.
First, though, Wotus had another task.
"No Boss tomorrow. We'll have Waylon Jennings,'' Wotus said. "A matter of fact, we'll have to find some nice, calm Waylon Jennings. I'm going to talk to the grounds crew right now.''