Lee Sargent, a converted third baseman who has suddenly deveoped into a top-notch pitcher, hurled the Crimson baseball team to an 8-3 win over Boston University yesterday at Splinter Stadium.

Sargent struck out six Terriers and walked only one. The three runs he allowed were all unearned and he pitched the full nine innings, while his earned run avarage sank to a miniscule 0.47.

Crimson pitching this spring, in fact, has been little less than fantastic. In 36 innings of pitching the combined staff has an earned run average of 1.15, plus six complete games and two shutouts to its credit.

Meanwhile, the Crimson hitters passed the first of a number of severe tests which they will face in upcoming weeks and passed it with ease. They thoroughly thrashed B.U.'s big Bob Walsh for six earned runs and an assortment of extra base hits.

Walsh was responsible for much of his own trouble. After Harvard jumped off to a 1-0 lead on Mike Patrick's infield single and Tom Stephenson's triple, the Terriers tied it up on a run caused by three errors. Walsh seemed to be out of the second inning when he got two men out after Jim Tobin singled.

But the big righthander dug his own grave, walking Sargent and Skip Falcone. Then, with a two-strike count on George Neville, he tried to fire a quick strike three past him instead of wasting a pitch. Neville sent it back past his ear into center field for two runs, and Patrick's single a moment later made it 5-1.

The Terriers narrowed it to 5-3 in the seventh on two more unearned scores, but the Crimson sewed up the game an inning later. With Bobby St. George and Sargent on base, Falcone doubled to left, scoring two. He came in himself a moment later after the B.U. shortstop booted Neville's grounder.

The Crimson starts its Eastern League campaign today with Paul del Rossi opposing Brown at 2 p.m. Opposing him will be lefthander Doug Nelson, who beat Harvard 5-1 for the Bruins last year.