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The Ultimate Fighting Championship just keeps hitting doubles. The promotional had trouble finding a main event for UFC on ESPN 4 this Saturday in San Antonio, Texas, but settled on Rafael dos Anjos-Leon Edwards -- a perfectly suitable fight to help shake out things at 170 pounds and supplement a solid lineup. Everything here has an angle, whether it comes in important fights from the lightweight Top 20, well-known veterans or even some exciting prospects on the deeper prelims.