Mikolas was placed on the paternity leave list Wednesday.
This will not impact his next start as Mikolas is expected to take the mound against the Cubs on Sunday. Across 19 appearances with the Cardinals this year, he's posted a 2.79 ERA and 1.05 WHIP with 83 strikeouts in 119.1 innings. In a corresponding move, Matt Bowman was recalled from the minors.