Watts requested to be traded to St Kilda at the end of the 2005 season, citing limited playing opportunities at Adelaide.
[4] A deal was made with Adelaide, in which St Kilda traded their first round selection (number 17 overall) at the 2005 AFL Draft in return for Watts.
Watts made his debut for St Kilda in the 2006 AFL season opener against West Coast, where he kicked one goal.
[5] Dropped to St Kilda's Victorian Football League (VFL) affiliate Casey Scorpions, Watts broke his ankle two weeks later.
[6] Although returning to the VFL in the latter half of 2007, Watts was unable to break back into the AFL and at the end of the season he was delisted by St Kilda.