High School: 5th-ranked outfielder and 33rd-ranked player in the state of Pennsylvania by Perfect Game ... First Team All-Area and Outfielder of the Year as a senior ... Perfect Game All-Region Honorable Mention as a senior ... batted .450 with four home runs, 19 RBIs, 16 runs scored and .530 on-base percentage as a senior ... All-Conference Honorable Mention as a junior after batting .370 ... Two-year varsity starter and 2014 Team Captain at Bayard Rustin High School ...Perfect Game Preseason All-American Atlantic Regional Honorable Mention and 2014 First Team Preseason All-League entering seniors season ... First Team All-League as a junior and Second Team All-League as a sophomore ... Member of Chester County's Carpenter Cup team ... Member of National Honor Society.
Personal: Born Markus Erik Osis on 9/9/95 in West Chester, PA ... son of Ellen and Ivars Osis ... has one brother, Karl ... intended major is Business Administration.