Dec 13 2015: Mark Sheffield places 9th at the Single Speed B Race at the Sacramento CX #8 - Sacramento Raceway

Nov 15 2015: Mark Sheffield places 8th at the Single Speed B Race at the Sacramento Cyclocross - Gibson Ranch Park

Oct 25 2015: Mark Sheffield places 9th at the Single Speed B Race at the Sacramento CX #3

Oct 11 2015: Mark Sheffield places 9th at the Single Speed B Race at the Sacramento CX #2