Ferrell was forced to leave Monday's game after he was struck in the head by a line drive, Jason Beck of MLB.com reports.
Ferrell was able to stay standing after taking the blow, somehow, but it would still be a surprise if he didn't suffer a concussion. The line drive off the bat of Ryon Healy had a 102.6 mph exit velocity, so it's a good bet that Ferrell won't be able to make his next start. Expect the club to monitor Ferrell's status overnight and provide updates as the week progresses.