He also played for West Adelaide in the South Australian National Football League (SANFL).
In 1981, Wests coach Neil Kerley appointed Borchard as captain West Adelaide, with the highlight being the 1983 premiership where he won the Jack Oatey Medal as the player of the match in the Grand Final win over Sturt at Football Park in front of 47,129 fans.
Borchard remained captain of The Bloods until the end of the 1985 season when they finished in third place, beaten in the Preliminary final by North Adelaide.
After the premiership win in 1983, Borchard began to be plagued by injury, only playing in 14 games in 1984, 17 in 1985 when West reached the preliminary final.
In 1986, Bloods coach John Cahill replaced Borchard as club captain with Mark Mickan, with injury restricting him to just 3 games for the year.