Freshman focus: Texas, USC, Louisville freshmen play big roles

Texas RB doesn't let the defense stop him

Texas RB Chris Warren III runs through the majority of the Texas Tech defense for a 21-yard touchdown in the third quarter.

Each college football season sees a number of prospects transitioning from high school to college and having an impact on the field in their first year. Each week during the 2015 season we’ll take a look at five true freshmen who stepped up and made their presence felt: