Bat restrictions top challenges in college baseball

From USA today:             http://www.usatoday.com/sports/college/baseball/2011-01-27-bat-restrictions_N.htm

This season's restrictions on the metal bats used in college baseball continue an evolution that began in 1998. At that time there were almost no limits on a bat's composition, weight or length, freedom which created an era known as "Gorilla Ball." Division I set records that season that still stand for average runs scored (14.2) and home runs hit (2.2) per game. When the championship final of the College World Series between Southern California and Arizona State produced a 21-14 slugfest won by the Trojans, the NCAA implemented the "Ball Exit Speed Ratio" (BESR) to dampen the power of the metal bats. The BESR has been replaced by the Batted Ball Coefficient of Resolution (BBCOR), which brings bats even closer to duplicating the properties of wood. More