Lachemann, along with his brothers Bill and Rene, attended Susan Miller Dorsey High School in Los Angeles, California.

[3] On June 16, Lachemann earned his first career win after tossing three scoreless innings in the first game of a doubleheader against the Kansas City Royals.

[5] Lachemann ultimately finished the season with a 4–1 record, two saves and a 3.95 earned run average (ERA) in 28 games.

[15] On November 15, 2011, Lachemann returned to the Angels as a special assistant to general manager Jerry Dipoto.

[15] In January 2023, Lachemann was hired as a special assistant in player development by the Rockies, marking his second stint in the organization.