Greaves beat Rob MacCachren for the 2013 TORC championship by 20 points. One of Greaves highlights in the season was battling his son C. J.'s Pro 2 for the 2013 AMSOIL Cup. After the Pro 4 trucks started behind the Pro 2 field, Greaves passed all of the Pro 2 trucks except his son's. The two battled against each other for the final four laps. They pulled side by side coming out of the final corner and jumped across the line in a photo finish won by C.J.