Yastrzemski is out of the lineup for Sunday's game against the Reds.
The left-handed-hitting Yastrzemski started in the first two games of the series and went 3-for-6 with a double, two walks, two RBI and a run, but he'll hit the bench Sunday while lefty Nick Lodolo takes the hill for the Reds. Mauricio Dubon will spell Yastrzemski in left field and will bat fifth.