FILE - In this March 27, 2018, file photo, Los Angeles Angels' Mike Trout runs to first base after hitting a single during the third inning of an exhibition baseball game against the Los Angeles Dodgers, in Los Angeles. Tune into any game these days and you're bound to see hitters wearing helmets with a seven-inch piece of plastic _ the C-Flap _ curving around their cheek and jaw. (AP Photo/Jae C. Hong, FIle)