Pratt isn't in the lineup for Friday's game against the Cardinals due to an illness, Hunter Baumgardt of Fox Sports 920 Milwaukee reports.
Pratt went 2-for-3 with an RBI and a steal in Thursday's series finale against Philadelphia, but he'll be unavailable to begin the Brewers' final series of the regular season as he recovers from an illness. David Hamilton will take over at shortstop and bat ninth.