Rocco Quinn's winner saw Ross County leapfrog Kilmarnock to end the season ninth after a 2-1 victory at Rugby Park.
Ross County boss Jim McIntyre paid tribute to skipper Richard Brittain after he made his final appearance for the club.
Josh Magennis will face no further action following his public spat with team-mate Jamie Hamill at Firhill last weekend.
Kilmarnock's Josh Magennis has been issued with a notice of complaint by the SFA after clashing with team-mate Jamie Hamill.
Tope Obadeyi scored twice to help Kilmarnock to an emphatic 4-1 win over Partick Thistle at Firhill and guarantee survival.
Motherwell defeated Kilmarnock 3-1 to boost their Scottish Premiership survival hopes and relegate St Mirren.
Motherwell manager Ian Baraclough claimed his team are in the ascendancy after their 3-1 victory over Kilmarnock.
Hamilton Accies claimed their second win on the bounce as they beat Kilmarnock 3-2 at Rugby Park.
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