Joseph is not in the lineup Monday against the Diamondbacks, Todd Zolecki of MLB.com reports.
Joseph's absence is a rare occurence, as the first baseman has started every game this month and missed only four games all season. However, in light of his 1-for-9 slump over the past three games, Monday's matinee appears to be an ideal time for a mental break. Brock Stassi will fill the void at first base.