Pat Welsh, a freshman attacker, scored with 12 seconds remaining in the fourth period today to lead third-ranked North Carolina to an 11-10 victory over top-ranked Johns Hopkins.

Welsh scored four goals as a crowd of 6,200 watched the Tar Heels end Hopkins' 19-game winning streak. The Blue Jays, the 1984 NCAA champions, led, 6-4, at halftime but North Carolina dominated the second half.

The Tar Heels increased their record to 4-2 overall and Hopkins lost for the first time in six games.

Welsh, a 180-pound freshman from Ellicott City, Md., scored the Tar Heels' last two goals to offset a late surge by the Blue Jays. Brian Wood and John Krumenacker both scored for Johns Hopkins in the last 61 seconds for a 10-10 tie. The Blue Jays were penalized with 23 seconds remaining and Welsh quickly capitalized on the Tar Heels' extra-man advantage.

Johns Hopkins has lost only eight games the last six seasons, and five of the losses have come against North Carolina.

Mac Ford and Gary Seivold each scored two goals for North Carolina. Wood led Johns Hopkins with three goals. Del Dressel, Craig Bubier and Steve Mutscheller had two goals each for the Blue Jays.

Carolina rebounded from a 10-5 loss last Sunday to Maryland.