Matthew Kent "Matt" Olson (born March 29, 1994) is the MLB player playing for the Atlanta Braves. He is wearing #28 for the team. He plays as a first baseman. He bats left-handed but throws right-handed. He was born on March 29, 1994 in Atlanta, GA. He was drafted by the Athletics as the #47 overall pick as compensation of the 2012 MLB Draft. He has played for 5 seasons in the Major Leagues since making his MLB debut on September 12, 2016. His nickname is Oly.
According to the MLB Network, he is the #44 MLB player into 2021 at age 26.
SOURCE
https://www.mlb.com/player/matt-olson-621566 on the Athletics MLB website.