Mark Grace is a former Major League Baseball first baseman for 16 seasons with the Chicago Cubs and Arizona Diamondbacks. He batted left-handed. He wore jersey number 28 and 17 during his rookie season in 1988, and he kept number 17 for the remaining of his career. Grace retired with a .303 batting average and a .383 career on-base percentage, the 148th best in major league history. Mark Grace has hand signed this Louisville Slugger Pro Stick Blonde 34 inch Bat. Bold black full pristine signature. Schwartz Sports Hologram. Image of actual item in stock - as shown