Diaz had X-rays come back negative and was diagnosed with a bruised left wrist after exiting Sunday's 1-0 win over the Astros, Ryan Bass of Bally Sports Sun reports.
The first baseman initially attempted to stay in the game after being struck by a 109.8 mile-per-hour grounder off the bat of Yordan Alvarez but was ultimately removed from the contest. Diaz went 1-for-2 with a walk before leaving the game. He avoided a fracture and should be considered day-to-day heading into Tuesday's series opener at St. Louis.