Defending PSAL champs Tottenville, the second seed, opened the first round of the playoffs at home with a 10-2 win over No. 31 Midwood yesterday, getting four RBI from Mike Giuffre. The team the Pirates beat in the finals a year ago, No. 4 Monroe, got past No. 29 LIC, 2-1, with Jesus Vasquez surrendering just an unearned run in the complete game victory.

In other games, top-seeded Madison defeated No. 32 Evander Childs, 3-0; No. 19 Bayside beat No. 14 Walton 3-1, No. 6 George Washington knocked off No. 27 Brooklyn Tech, 9-1, No. 16 Cardozo beat No. 17 Bryant 5-4, No. 8 Wagner defeated No. 25 Environmental Studies 12-2; No. 9 JFK beat No. 24 Brandeis 8-1; No. 13 Gompers shutout No. 20 New Utrecht, 3-0; No. 5 Norman Thomas defeated No. 28 Sheepshead Bay 4-0; No. 12 McKee/SI Tech beat No. 21 Forest Hills 12-0; No. 18 Clinton upset No. 15 Beacon, 9-7; No. 7 Telecommunications knocked off No. 26 Newtown, 6-0; No. 10 Grand Street beat No. 23 New Dorp, 7-1 and third-seeded Lehman held off No. 30 Stuyvesant, 3-1.