The Cubs placed Brown on the 15-day injured list Wednesday due to a neck strain.
Brown wasn't known to be nursing a neck issue, as he cruised to his second win in as many starts during his most recent appearance Friday against the Blue Jays. He'll be eligible to return from the IL in early July, but the Cubs haven't yet provided a timeline for Brown's activation. Brown boasts a 1.70 ERA and 41:11 K:BB over 42.1 innings covering eight starts since entering the Chicago rotation.