Diaz went 5-for-6 with a double and four RBI in Sunday's 11-7 win over the Cardinals.
Diaz couldn't be contained Sunday, matching his career high in hits while tallying his 10th career game with at least four knocks. The 34-year-old first baseman is coming out of the gates furiously, going 9-for-16 (.563) in his first three games while hitting safely in each outing so far as Tampa Bay's leadoff man.