FORT LAUDERDALE, Fla. (AP) _ Baltimore outfielder Luis Matos separated his left shoulder Tuesday as the Orioles defeated the Montreal Expos 7-6.

Matos got hurt sliding into third base in the third inning. X-rays were negative, but he will undergo an MRI on Wednesday to determine the extent of the damage.

Matos, who played in 72 games as a rookie with the Orioles last season, is competing for a backup spot this spring.

The game featured a rare father-son matchup, as Tim Raines started in the leadoff spot for the Expos and his son, Tim Jr., batted at the top of the order for the Orioles. Both hit RBI singles.

Jeff Conine tripled in the eighth off Scott Strickland and scored the tiebreaking run on a grounder. The Expos had the potential tying run cut down at the plate in the ninth on an ill-fated double steal.

Orioles starter Josh Towers allowed one run in three innings and Jay Gibbons drove in three runs as Baltimore won its fourth one-run game and improved to 5-0.

``Even though it's spring training, even though it's the first week, we've gone out and made things happen,'' Orioles manager Mike Hargrove said. ``That's the way we need to play.''

Milton Bradley went 3-for-3 with a two-run homer for the Expos.