What happened: A pitch struck Mead’s wrist in the fourth inning Monday, and he exited before the bottom of the fifth. Initial X-rays were negative before subsequent testing found the fracture.

Why it matters: Boston had acquired Mead as right-handed infield help one day before his debut. His absence reopens a lineup need the club had just addressed.

What to watch: Boston’s next roster move will show whether it pursues another bat before Monday’s 6 p.m. ET deadline.