“They’re killing it,” manager Mike Matheny said.

Top prospect Oscar Taveras, surging newcomer Randal Grichuk, and Stephen Piscotty entered Friday’s game a combined 22 for 40 (.550) over their previous three games. Taveras and Grichuk had three hits apiece Thursday, and earlier in the week Taveras had a season-high four-hit game. Grichuk hit his ninth homer of the season. They two are positioning themselves as the Cardinals discuss whether interleague play at the American League ballparks gives them reason to promote a prospect for the open playing time.

Mozeliak said last week the idea was intriguing.

Matheny echoed that sentiment.

“There is potential there. There’s potential,” Matheny said. “A couple guys down there are playing some really good defense, too. I always like the idea of how that could possibly free up some of our regular players to be in the DH role.”

Taveras has hit .405 with a homer over his past 10 games. Four times he’s had at least three hits in that stretch. Mozeliak referenced how all three outfielders have not had a full season at Class AAA in their career, and he rejected the idea that their development could be impeded by remaining in Memphis.