Chapman played in two games for the Raton Osos of the Pecos League in 2013 before playing in the Texas Summer League, where he hit .244 (10 for 41) with 10 runs scored and six RBIs with nine walks. Also pitched two games in the TSL. At Gallaudet (Division III) he led the North Eastern Athletic Conference in doubles (18) in 2012 and was ranked second in on base percentage (.488), hit by pitch (13), third in batting average (.404), fourth in hits (55), runs (43), fifth in slugging percentage (.574), eighth in total bases (78), 14th in RBI (30) and 15th sacrifice flies (three) in the 41 games he started. In the field he had a .966 fielding percentage. He also made 11 pitching appearances (six starts) where he went 3-0 against conference opponents. The Bison set a team record with 25 victories in 2012. A two-time Jewish Sports Review All-America first team for college baseball at the Division II, III and NAIA levels.