Faehse made his league debut with the wartime West Adelaide-Glenelg combination on 27 May 1944, initially in the Ruck.
He would go on to play seven more games before a broken ankle put him out for the season, the longest layoff throughout his football career.
After attending Prince Alfred College and with World War II coming to an end in 1945 West Adelaide and Glenelg both resumed as separate clubs, with Faehse remaining with The Bloods being a member of Wests Colts in 1943 and beginning an apprenticeship as an electrical engineer.
Faehse was a member of West Adelaide's 1947 premiership side which defeated Norwood 10.15 (75) to 5.15 (45) in front of just over 32,000 fans.
Faehse was involved in an incident with Port Adelaide player Dave Boyd just before half-time of the 1954 SANFL Grand Final.
Faehse was given the honor of being the first player to use the tunnel when as captain he led West onto the field for a game against Norwood in 1955.
Faehse represented South Australia with distinction 19 times between 1948 and 1956 and played in the 1950 (Brisbane), 1953 (Adelaide) and 1956 (Perth) Australian National Football Carnivals.