Former Auburn running back Corey Grant is doing a pretty good job impressing the scouts at the Tigers’ pro day this afternoon. The 5-foot-11, 205-pound running back did not receive an invite to the Senior Bowl or the NFL Combine, but he’s making up for that today. Grant might be the fastest player available in the upcoming NFL Draft. According to multiple people in attendance at Auburn’s pro day, Grant ran a sub-4.3 40-yard dash. Hearing unofficial 40 chatter of 4.27 and 4.28 for AU RB Corey Grant. Workout wonder. #AUProDay— Chase Goodbread (@ChaseGoodbread) March 3, 2015BREAKING: Corey Grant is fast. Unofficially a 4.27 40 at Pro Day— Tom Green (@Tomas_Verde) March 3, 2015Times are often a little faster at pro days than they are at the combine or at NFL team’s individual workouts, but that’s still an incredibly impressive performance by Grant. He’s certainly helping his draft stock today.