Sammy Sosa was a big hit in his Orioles debut, and Pedro Martinez felt so good in his first start for the Mets that he threw 60 pitches.

Mark Mulder, Carl Pavano, Derek Lowe and Jon Lieber all took the mound Friday as several teams took a first look at their big offseason acquisitions.

With a looping swing of the bat and a gleeful hop at the plate, Sosa homered and went 2-for-3 in Baltimore’s 3-1 loss to the Florida Marlins at Fort Lauderdale, Fla.

Sosa, playing DH because of a slight groin strain, came to the Orioles last month in a trade with the Chicago Cubs, who all but gave away the slugger after he wore out his welcome in the Windy City.

“Those guys love me already,” he said. “I’m such a perfect fit here, I’m so happy to be here in a new house. It’s incredible, let me tell you the truth. I feel like I’ve been here forever.”

At Jupiter, Fla., Martinez picked up right where he left off last season. In three innings, the 33-year-old right-hander allowed three hits, struck out three and was credited with the win — a 7-5 victory over the St. Louis Cardinals — in his first outing since leaving Boston for a $53 million, four-year contract with the Mets.

New Mets manager Willie Randolph had no problem letting Martinez throw so many pitches this early in spring training.

“We’re not going to get crazy about pitch counts,” rookie manager Willie Randolph said. “We don’t worry about that because he’s in great shape. You see him work. He’s not going to break. He’ll be fine.”

Mulder, on the other hand, was wild from the start and lasted just one inning for St. Louis. He walked four and gave up a two-run single to Cliff Floyd in his first appearance since he was traded by Oakland on Dec. 18.

At Kissimmee, Fla., Roger Clemens kicked off his 22nd major-league season with two scoreless innings for the Houston Astros in a 5-4 victory over the Cleveland Indians. Juan Gonzalez hit a two-run home run for Cleveland.

In other games:

Pirates 9, Yankees 6

At Bradenton, Fla., Pavano gave up three hits in two scoreless innings in his first start since signing as a free-agent with New York. He struck out two and walked none. Ben Grieve, trying to win a job on the Pittsburgh bench, went 2-for-3 with a double and three RBIs.

Jason Giambi is slated to make the trip to Lakeland today to play his first road game.

Braves 3, Dodgers 2

At Kissimmee, Lowe pitched three scoreless innings in his Los Angeles debut. Lowe, whose last appearance was in Boston’s World Series-clinching victory, gave up only a single to Andruw Jones. Dodgers outfielder J.D. Drew got a chance to face his former team. Booed lustily in his two at-bats by the pro-Atlanta crowd, he struck out both times.

Tigers 3, Phillies 0

At Lakeland, Fla., Jon Lieber made his first appearance with Philadelphia and gave up a hit, walked one and struck out a batter in three innings. Detroit prospect Tony Giarratano hit a two-run homer, and Craig Monroe had an RBI double. Nate Robertson struck out three over two innings.

Diamondbacks 10, White Sox (ss) 9

At Tucson, Ariz., Tadahito Iguchi got his first major-league hits, going 2-for-2 for the White Sox. Orlando Hernandez gave up six runs in three innings.

Red Sox (ss) 17, Northeastern 0

At Fort Myers, Fla., Tim Wakefield threw the first two innings of a seven-inning no-hitter against Northeastern University, then staked his claim to a spot in Boston’s rotation.

Reds 4, Devil Rays 1

At Sarasota, Fla., Cincinnati’s Austin Kearns hit a two-run homer in the first inning off Hideo Nomo. Nomo, who signed a minor-league contract after going 3-11 in 18 starts for Los Angeles in 2004, allowed two runs on four hits in two innings.

Blue Jays 5, Twins 2

At Fort Myers, Fla., Joe Mays threw two scoreless innings in his return from reconstructive right-elbow surgery for the Twins. Closer Joe Nathan, who agreed before the game to a two-year contract extension with a club option for 2008, pitched two hitless innings.

White Sox (ss) 7, Rockies 5

At Tucson, Ariz., Aaron Miles hurt his knee when the Colorado second baseman was hit by Willie Harris on a take-out slide. Miles was diagnosed with a strained left knee, and the team said his status was day to day.

Cubs 8, Giants 3

At Mesa, Ariz., Nomar Garciaparra hit a two-run homer, and Kerry Wood pitched two scoreless innings in his spring training debut, leading the Cubs.

Brewers (ss) 8, Mariners 1

At Phoenix, Seattle’s Joel Pineiro gave up two runs and two hits over two innings of his first outing since straining his right elbow July 25. Geoff Jenkins doubled twice and scored a run, and first baseman Lyle Overbay drove in two runs for the Brewers.

Brewers (ss) 12, Athletics 8

At Phoenix, Carlos Lee hit a three-run homer off A’s starter Dan Meyer and went 3-for-4.