Winston-Salem's Dan Weppner tried a new pitching motion and received immediate dividends last night.

The 19-year-old southpaw from Boca Raton, Fla., hurled a masterful one-hitter, not allowing a base hit until the ninth inning as the Red Sox pounded the Alexandria Mariners, 14-0, in Carolina League action at Four Mile Run Park.

Jum Gabella, the ninth man in the order, ruined Weppner's gem with a ground single up the middle to lead off the ninth.

"I was throwing a different type of curve-I was coming more over the top than before," Weppner said. "My curve was more like a slider, coming from the side. Last game I pitched, gee, I was showing them the curve (by throwing arm) and, bam, I got pasted. Gave up seven runs and didn't make it out of the third inning."

Only one of those seven runs was earned, and the second-year Boston Red Sox prospect now sports a 2-0 record, with two shutouts and 0.49 ERA for his three appearances. Weppner retired the first 14 batters he faced before third baseman Ed Connors erred on Chris Hudson's slow grounder, pulling first baseman Stan Smith off the bag with a throw into the dirt.

The only other batter reach first before Gabella was Gary Pellant, who walked on four pitches with two out in the seventh.

Winston-Salem, which prevented the Mariners from pulling into a first-place tie, clubbed Alexandria pitching for 20 hits. Second baseman Erwin Bryandt had four hits, scored three runs and knocked home another in six at bats. Designated hitter Ron Harrington went three-for-five with two RBI and two runs scored, including a long homer to left-center in the fifth.