http://hardballtalk.nbcsports.com/2014/01/28/protective-caps-for-pitchers-approved/
The company says the caps are a little over half-an-inch thicker in the front and an inch thicker on the sides — near the temples — than standard caps, and afford protection for frontal impact locations against line drives of up to 90 mph and for side impact locations at up to 85 mph.
The cap weighs seven ounces more than normal caps which, themselves, only weigh three or four ounces
The company says the caps are a little over half-an-inch thicker in the front and an inch thicker on the sides — near the temples — than standard caps, and afford protection for frontal impact locations against line drives of up to 90 mph and for side impact locations at up to 85 mph.
The cap weighs seven ounces more than normal caps which, themselves, only weigh three or four ounces
http://espn.go.com/espn/otl/story/_/id/10363291/pitchers-protective-caps-approved-major-league-baseball
Four of the five pitchers who were hit in the head since Sept. 2012, including those most seriously injured — McCarthy, Happ and Tampa Bay’s Alex Cobb — were struck below the cap line. MLB, however, hasn’t contemplated exploring protective headgear for pitchers with broader coverage, such as a visor, mask or helmet, said Halem. “There would have to be widespread willingness among players to use such a device.”