Bring on the playoffs, because the Harvard baseball team has never been so ready.

The Crimson brought its 27-4 regular season to a close yesterday in peak form, sweeping a doubleheader at Brandeis, 18-1, 5-3, to capture the Greater Boston League (GBL) championship.

Harvard had already earned a berth in the NCAA Northeast Regional by virtue of the Eastern Intercollegiate Baseball League title, which the Crimson wrapped up Wednesday. The winner of the regional, played Memorial Day weekend, earns a spot in the College World Series.

And the batmen are definitely in playoff shape, averaging just under 13 runs per game in their last seven outings. The five-run nightcap ended a six-game streak of double-figure scoring Down 9-1 in the second inning of Saturday's game with Dartmouth. Harvard showed the heart and the muscle to bounce back for a 15-13 victory.

Everybody's hitting. In the opener at Brandeis, it was left fielder Scott Vierra, who announced his intentions with a first-inning grand slam, then got two more RBIs, two more hits and a stolen base.

In the nightcap, it was T.J. Andre, the junior second baseman who stepped into the gap left by injuries to Gaylord Lyman and Mike Pakalnis. In his fifth varsity appearance. Andre homered and went four for four with three RBIs and a stolen base.

Meanwhile, both Crimson starters tossed complete-game beauties Junior Charlie Marchese stretched his record to 7-0 with a six-hitter in the opener, while classmate Jeff Musselman pitched a four-hitter in the nightcap.

THE NOTEBOOK: Brandeis is 22-7 Sophomore third baseman Bobby Kay was hit in the left arm by a Ross Nadean fast ball in the first inning of the opener yesterday Kay had to leave the game in the fourth. "I think I'm all right." Kay said last night. "They don't think it's broken." He'll be x-rayed at UHS today just to be sure....Pakalnis is recovering from a broken nose suffered in batting practice last week. Lyman is recovering from a hyperextended knee suffered against Army....Harvard won back-to-back crowns GBL in 1980 and 1981. They are Harvard's only two other GBL championships since 1973....Despite the comparative rarity of GBL championships, the batmen care infinitely more about the Eastern League crown, which earns the team a playoff spot. "We should win [the GBL]." Crimson Captain Bruce Weller said. "We're the best team in the league year in and year out." Brandeis, which won the GBL two years ago, and Tufts, which won last year, care more about the league. GBL Standings   W  L  Pct.  GB Harvard  7  1  .875  -- Brandeis  6  2  .750  1 Tufts  4  4  .500  3 MIT  2  5  .286  41/2 Northeastern  2  5  .286  41/2 Boston College  2  6  .250  5

Crimson 18, Judges 1 HARVARD  ab  r  h  bl Weller cf  4  2  1  3 Kay 3b  2  1  0  0 Schindler 1b  3  0  0  0 DePalo c  3  4  1  2 Rivera 3b  4  2  2  2 Maspons dh  3  0  0  1 Vierra lf  3  2  3  6 McNamara If  1  1  1  1 DiCesare ss  3  2  1  1 Andre 2b  4  1  1  1 McAndrews rf  1  2  0  0 Vallone rf  2  1  0  0 Total  33  18  10  17 BRANDEIS  ab  r  h  bl Bonilla ass  4  0  1  0 Dotre rf  3  0  1  1 Follette c  3  0  0  0 Reid 3b  3  0  0  0 Drogin lf  3  0  0  0 Russell dh  3  0  2  0 Mitchell 1b  2  0  0  0 Caesar cf  3  0  1  0 Hughes 2b  2  1  1  0 Pacheco 2b  1  0  0  0 Total  26  1  6  1

Harvard  400  270  5--18 Brandeis  001  000  0--1

Game-Winning RBI--Vierra E--Highes 2 Bonilla Andre DP--Harvard 1 LOB--Harvard 1. LOB-Harvard 8, Brandeis 8 28--Weller, Rivera 2, Russell HR--Vierra SB--Andre, McAndrews, Vierra, Datre, Hughes CS--Dr. Cesare IP  H  R  ER  BO  SO Harvard Marchese W.7-0  7  6  1  1  3  8 Brandeis Nadeau L. 7-2  41/2  5  13  9  9  5 Hebert  21/2  5  5  1  2  0

WP--Nadeau 2. Hebert PB--DePato HBP--Kay Vierra by Nadeau. Crimson 15, Big Green 13 DARTMOUTH  ab  r  h  bl Bascio 2b  4  2  2  1 Mitchell rf  5  1  1  0 PLavery if  4  1  1  2 JLavery 1b  4  1  1  2 Twachimanic  2  3  1  0 Karot cf  4  2  3  5 Timmons dh  4  1  3  2 Fuller 3b  3  1  0  0 Rusert as  4  1  1  1 Total  34  13  13  13

HARVARD  ab  r  h  bl Weller cf  3  4  2  1 Kay 3b  4  1  2  2 DuPalo dh  5  1  2  2 Rivera 1b  4  1  3  2 Maspons c  2  1  2  3 Vierra if  4  1  0  0 Dicessare ss  3  3  2  2 Andre 2b  3  0  1  0 McAndrews rf  2  3  2  3 Total  30  15  16  15

Dartmouth  090  220  0--13 Harvard  104  244  x--15

Game-Winning RBI--Depalo E--Maspons 2, Di-Cesare, Truft. LOB--Harvard 7, Dartmouth 5 2B-Weller, Dupalo, Rivera 2, Mitchell, Twachtmann, Karol HR-DiCesare, McAndrews, Maspons, SB--Weller, PLavery 2, Twachitmann. CS--PLavery Kay Sf--Kay SF-Kay. Twachtmann.   IP  H  R  ER  BO  SO Dartmouth Hill  3  5  7  7  5  0 Truitt  2  8  6  5  3  2 Hadley L  1  3  2  2  1  0 Harvard Presz  12/3  6  7  7  1  1 Sution  2  4  4  2  2  1 Sorbara W.3-1  31/2  3  2  0  0  3

Hill faced two betters in fourth Truft faced three in sixth.

HBP--Weller by Truff. Maspons by Hill, Fuller by Pretz WP--Sutton, Truft PB--Maspons

T--2 46 A--66 Crimson 5, Judges 3 HARVARD  ab  r  h  bl Weller cf  3  1  1  0 Schindler 3b  3  1  2  1 DePaloc  4  0  1  0 Rivera 1b  4  0  1  1 Maspons dh  3  1  0  0 Vierra II  3  1  1  0 DiCesare ss  3  0  1  0 Andre 2b  4  1  4  3 McAndrews rf  4  0  1  0 Total  31  9  12  5 BRANDEIS  ab  r  h  bl Bonilla ss  3  0  1  0 Datre rf  3  0  0  0 Follette c  2  0  0  0 Reid 3b  2  1  1  0 Russell dh  3  0  0  0 Drogin lf  3  1  1  0 Mitchell 1b  2  0  0  0 Caesar ct  2  1  1  2 Hughes 2b  2  0  0  0 Total  22  3  4  2

Harvard  111  110  0--1 Brandeis  620  010  0--3

Game-Winning RBI--Andre E-Bonillia, Caesar Benitez, Dicesare DP--Harvard 3 Brandeis 2. LOB--Harvard 10, Brandeis 2-2B--DiCesare HR-Andre, Schindler SB--Andre McAndrews DuPaulo CS Mitchell. IP  H  R  ER  BO  SO Harvard Musseiman W. 5-2  7  4  3  2  3  4 Brandeis Benitez L.2-1  7  12  5  5  4  1

HBP--Reid by Musseiman