He was part of the Poland national team who were at the 1952 Summer Olympics.
He returned home in 1947 to play for Ruch Chorzów and aided them to a championship titles in 1951, 1952 and 1953.
When he departed from the team in 1958 he had scored 51 goals in 176 matches, and though he moved to Górnik Katowice, he took on more of a coaching role than a playing one.
Alszer played in fourteen international matches, the first of which was against Yugoslavia in 1948.
This biographical article related to a Polish association football forward is a stub.