NEW YORK (AP) — Major League Baseball is increasing its monitoring of baseballs in an attempt to suppress any use of foreign substances by pitchers.

Mike Hill, newly hired as executive vice president of baseball operations and disciplinarian, wrote that team leaders may be held responsible for violations by staff.

In a two-page memo to owners, Hill outlined three new enforcement components that include gameday compliance monitors and electronics compliance officers, submission of random baseballs by umpires and equipment authenticators and a review of MLB Statcast data comparing games to pitchers’ career norms.