Catcher John Hicks was called up from the Triple-A Toledo Mud Hens to take Martinez's roster spot.
He drilled 27 home runs a year ago and gives the Tigers another power threat in the order alongside the likes of Miguel Cabrera, Justin Upton and J.D. Martinez. The Tigers expect further information on Saturday.
The Tigers should be able to hold down the fort in Martinez's absence, but it is clearly frightening to hear that a player has been hospitalized, and hopefully he can recover soon.