“You don’t have many more of the four-hour, 20-14 games that you had in the past,” said Jeff Hurd, the chairman of the N.C.A.A. baseball rules committee. “I think it’s a better game, a better game to watch, more of true baseball. Whether there needs to be some tweaking of what has been done, I don’t know. But when you compare the game to where it was two years ago or three years ago, it’s a better game.”

In 2009, in part because of lobbying by Minnesota Coach John Anderson, the N.C.A.A. adopted the testing standard known as BBCOR, for Ball-Bat Coefficient of Restitution, to replace Ball Exit Speed Ratio, or BESR, starting with the 2011 season.

BBCOR measures the bounciness or give of an aluminum bat at the moment of contact with a ball. The more bounciness, the faster the ball flies off the bat. For a bat to be approved, manufacturers must submit samples to an N.C.A.A. certification center at Washington State University. Approved bats carry a certification mark, and umpires check bats for these marks before every game, Hurd said.

The effect was immediate. N.C.A.A. statistics through midseason — the most recent figures available — showed that runs, home runs and batting averages had dropped considerably in all three divisions compared with the same point last season. In Division I, scoring fell to 5.63 runs per team per game from 6.98, homers to 0.47 from 0.85, and batting average to .279 from .305. Pitchers’ earned run average also dipped, to 4.62 from 5.83.

“I think they accomplished what they set out to do, which is to make a woodlike standard,” said Matt Arndt, a senior vice president for Easton Sports, which supplies bats for three College World Series teams — Florida, California and Texas A&M.