Career

Wallen was born in Milwaukee, Wisconsin and also died there. He batted and threw right-handed in his 4 games for Boston, having 2 hits in 15 at-bats, with a batting average of.133. After only two weeks of play in the major leagues with the Braves, Wallen was hit in the knee by a line drive.

The injury ended his career in baseball.

He was buried in Holy Cross Cemetery in Milwaukee, Wisconsin.