In November 1982, the Texas Rangers signed 17-year-old Ruben Sierra out of Puerto Rico. Sierra made his major league debut on June 1, 1986 as an outfielder and hit a home run in just his second MLB at bat becoming the first Texas Rangers player to accomplish this feat. Ruben Sierra has hand signed this Official Rawlings Major League Baseball. Full blue pristine signature. Certificate of Authenticity from Athlon Sports Collectibles.