You're right. Originally I thought you were thinking of Storm Throw, but Sawk can't learn Circle Throw either. In fact, Sawk can't learn ANY moves involving throwing.http://www.smogon.com/smog/issue14/firstvsfifth
According to this...
If I remember correctly, Throh is Nageki(big fat red dude), Sawk is Dageki(lean mean blue dude). Sawk doesn't get Overhead Throw, that's Throh. >_>
Did something get pwnt here?