Hulett, who started at third base for Leo Gomez, nearly hit for the cycle, getting a single, double and triple in four plate appearances.
He also scored an insurance run in the eighth inning, coming in on a squeeze bunt base hit by McLemore.
"I wished I had got another at-bat," said Hulett, when told of his near-cyclical performance.
The collision of Randy Milligan and Bill Ripken provided both Hulett and McLemore with more at-bats and they have responded, earning even more playing time.
Manager Johnny Oates said: "I feel very comfortable when Timmy's in the game, whatever he's doing. He's always thinking, and he does all that he's asked to do."
McLemore, who is hitting .368 after yesterday's 2-for-5 performance, dropped a textbook bunt down the third-base line, then ran hard up the first-base line, applauding as he crossed with a hit.
"You put players in a situation where they can produce," said Oates. "You don't ask a slugger to bunt. Mark handles the bat well, and I knew he could produce in that situation."
About the only blot on the day for either player was Hulett's two errors, including a flubbed double-play ball in the third, which opened the door to four Seattle runs.
"I'll remember the two errors more than the hits," said Hulett. RTC "But [former teammate] Ron Kittle once said, 'As long as you bring in more than you give up, you're OK.' "
First baseman Glenn Davis said he has experienced some "tenderness" during recent workouts but still feels on target to return to the lineup sometime this week.
"I've been pushing and pushing lately," said Davis before yesterday's game. "It [the rib-cage muscle] is a little tender from being used . . . but it's not a reversal tenderness."
Davis used the indoor batting cage and took infield practice.
Davis said that Oates and others in the organization had mentioned the possibility of his going to the minors for a rehabilitation assignment before returning to the roster, but said he probably wouldn't do that.
"That's up to Johnny. Johnny is in control of the situation," said Davis, who has not played since Opening Day. "I have confidence in him. I trust him and what he does."
L Oates said: "He seems to be really upbeat and feeling well."
Yes, that really was ex-Orioles catcher Rick Dempsey last night on "America's Funniest Home Videos," appearing to catch a fish with his mouth.
Dempsey said he developed the technique in 1984 in the Florida swamps, and footage of one of his "catches" appeared on the show that features wacky people doing wacky things.
"You go down below the surface with bait in your mouth and the fish swim right to it," said Dempsey. "I caught a bass. Bass are stupid, you know."
Around the park
Yesterday's crowd of 45,352 was the fourth sellout of the season and the second straight.
About 8,000 tickets are left for tonight's series opener with the Texas Rangers. Fewer than 1,000 remain for tomorrow afternoon's game, which closes the series.
There are about 3,000 seats left for Wednesday's game with the Minnesota Twins. About 6,000 remain for Thursday's series finale.
For 10 home dates, the Orioles have drawn 441,695, the most in club history by 171,957.
The Orioles hadn't swept the Mariners in Baltimore since Sept. 1-3, 1980. . . . The Mariners' six runs and nine hits yesterday are the most the Orioles have given up at home. . . . Before Brady Anderson, the previous Orioles leadoff hitter to lead the league in RBI at any time during the season was Don Buford, who had 14 in 11 games in April 1969. . . . Jay Buhner's second-inning walk was the first allowed by Orioles pitchers in 23 innings. . . . Edgar Martinez tied a Mariners record with two triples. . . . The Orioles have homered in eight straight games, a total of 14 homers. They are averaging 5.2 runs, highest in the majors. . . . Ken Griffey, who has a sore back, missed his first game of the year.