Montrose Christian's Marvin Lewis and Mohammed Diakite had the hot hands in a cold gym yesterday, helping the Mustangs beat DeMatha, 30-22, in the championship of the 32-team D.C. Board Games boys basketball tournament at American University's Bender Arena.

Lewis scored a game-high 13 points and made 5 of 9 field goals, and Diakite added seven points. Their performances came in chilly, 65-degree conditions as event organizers, expecting a larger crowd and warmer weather outside, cranked up the arena's air conditioning.

"It was definitely cold in here," said Lewis, a 6-foot-4 senior forward. "It took a while to get warmed up but once we got going it was okay."

The win, Montrose's second this summer over DeMatha (it won earlier this summer in St. Albans's Ban The Brick League), continued to heighten expectations for the Rockville private school. The Mustangs went 32-6 last season and will have four starters returning to join junior Levi Watkins, a transfer from Pallotti. Last month the school hired Stu Vetter, who won an unofficial national championship at St. John's/Prospect Hall two years ago, to be its head coach.

Defending Board Games champion McNamara won the third-place game by defeating Thomas Johnson of Frederick, 49-36.

First-Place Post

Damascus Post 171 increased its lead to a full game in Montgomery County League American Legion baseball with a 6-0 win over third-place Gaithersburg Post 104 at Damascus Regional Park. St. Mary's College sophomore Danny Fisher went the distance on the mound, striking out seven, as Post 171 improved to 16-3. Post 104 dropped to 14-7, behind second-place Gaithersburg 295 (16-5).

Shamrocks Roll

Renee Oursler's two-out RBI single in the bottom of the seventh inning scored Jill Bumler with the winning run Saturday as the Shamrocks of Northern Virginia beat Southern Maryland Dynasty, 2-1, in the deciding game of the American Softball Association Gold Central Atlantic Region tournament at Fairland Regional Park in Laurel. The Shamrocks will advance to their 13th straight ASA Gold National Tournament, which begins Aug. 2 in Chattanooga.

Special correspondents Mitch Rubin and Kevin Callahan contributed to this report.

CAPTION: Montrose Christian's Marvin Lewis runs into DeMatha's Robin Wentt on way to basket.