Once again, a pair of UFC champions are nominated for an ESPY award, an honor that has thus far remained out of reach for any top-level mixed-martial-artists. Light heavyweight champion Jon Jones and middleweight champ Anderson Silva are among the nominees for “Best Fighter” at the 2013 ESPN Espy Awards. Also nominated in the category are boxers Canelo Alvarez, Danny Garcia and Floyd Mayweather Jr. Fans can vote on the “Best Fighter” of the year and 34 other categories at the 2013 ESPY Awards’ official website . It’s the third straight year Jones has been nominated in the “Best Fighter” category. It’s also the third nomination for Silva, who was put up for the award in 2009 and 2012. Created in 2007 to replace the “Best Boxer” category that had been in place since 1993, the “Best Fighter” award has been claimed four times by Mayweather Jr. and twice by fellow boxer Manny Pacquaio