Freckle-faced Steven Domalewski was 45 feet from home plate when a screaming line drive off an aluminum bat hammered the 12-year-old in the chest. The ball hit the boy in the millisecond between his heartbeats, sending him into cardiac arrest. Three spectators rushed onto the field and resuscitated him, but the damage was done. He suffered brain swelling and went into a coma. Four months later, New Jersey lawmakers lastThursday began considering making the state the first to completely ban metal bats from youth sports. “The ball came so fast off the bat my son had absolutely no chance to cover or protect himself,” the boy’s father, Joseph Domalewski, said before speaking to a panel of lawmakers. A 2002 study by Brown University said balls hit off an aluminum bat averaged 93.3 mph, compared to 86.1 mph for wooden bats, and found 2 percent of balls hit off wooden bats exceeded 100 mph, compared to 37 percent hit off metal bats. Domalewski said just a bit more reaction time is all his son would have needed. He said the boy tried to shield himself, but instead suffered a traumatic brain injury and now cannot talk or see. He just started eating again, though that’s a struggle. “A split-second and maybe we would have had him home with a bruised shoulder,” Domalewski said. State Assemblyman Patrick Diegnan, who proposed the ban, says he was worried about the speed of balls shooting off aluminum bats even before he heard about Domalewski. Diegnan recalled cringing at line drives when his daughters played softball. “A fraction of second is the difference between life and death,” said Diegnan, D-Middlesex. Though Assembly lawmakers released the bill from committee, clearing it for a possible vote by the full house, it’s a long way from becoming law. Little League officials and bat manufacturers oppose it. Stephen D. Keener, president and chief executive officer of Little League Baseball and Softball, said rules requiring metal bats be similar to wooden ones have cut injuries to pitchers hit by batted balls. He said Little League had 170 million at-bats last year and 22 injuries to pitchers, down from 145 in 1992. “If this was in our opinion a safety issue, we should be leading the way on changes,” Keener said. “There is an insignificant difference between the non-wood bats that are used today and the wood bats they are tested against.” Former major league catcher and Princeton University baseball coach Scott Bradley said banning metal bats would cut participation in youth baseball. “I think we’re going to take a lot of opportunities and a lot of fun away,” Bradley said. But Montclair State baseball coach Norm Schoenig said lawmakers have little choice but to ban metal bats if they want to improve safety. “You can’t increase the reaction time of a 10-, 11- or 12-year-old young man just learning to play the game of baseball,” he said. Diegnan’s measure would mandate wooden bats for all leagues with players under 18. An exemption would be granted if a visiting team comes from out of state.