Twins VideoWhat is Royce Lewis ’ role on the Minnesota Twins this year? Much of this success starts with one of the most important attributes in hitting: bat speed. Lewis’ bat speed glides in at an average of 75.1 miles per hour, good enough to nestle him in the 85th percentile. Hard-hit metrics like exit velocity, hard-hit rate, slugging percentage and more all become more attainable with great bat speed. Another metric that can benefit from an above-average bat speed is barrel percentage, and Lewis is barreling up the baseball 12.8 percent of the time (84th percentile).