He won the fight via submission in the first round , the first submission win of his UFC career .
Rothwell faced Matt Mitrione on June 6 , 2015 at UFC Fight Night 68 .
Rothwell won the fight via submission in the first round , the first submission win of Rothwell 's UFC career .
Rothwell faced Matt Mitrione on June 6 , 2015 at UFC Fight Night 68 .