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Dec 15 2013: Michael O'Brien places 37th at the Men Masters CX 4/5 Race at the North Carolina Grand Prix Day 2
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Dec 14 2013: Michael O'Brien places 33rd at the Men Masters CX 4/5 Race at the North Carolina Grand Prix Day 1
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Dec 8 2013: Michael O'Brien places 18th at the Men Masters CX 4/5 45+ 45+ Race at the Salisbury Cyclocross Race
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Dec 8 2013: Michael O'Brien places 33rd at the Men Masters CX 4/5 (35+/45+/55+) 45+ Race at the Salisbury Cyclocross Race
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Nov 24 2013: Michael O'Brien places 30th at the Men Masters CX 4/5 (35+/45+/55+) 35+ Race at the Wilkesboro Cyclocross Festival Day 2
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Nov 10 2013: Michael O'Brien places 58th at the Men Masters CX 4/5 (35+/45+/55+) 35+ Race at the NasCross